Habitat Rehab

Habitat restoration is one of the most important challenges facing conservationists today. Without adequate habitat, endangered species can’t be recovered. Many human activities require restoration as well. Fully functioning wetland systems can provide flood control and clean drinking water. How does the process of habitat restoration work?

Restored coastal marsh, where dikes were removed to
allow the sea to once again access the land

The first step, as in medicine, is “First, do no harm.” A site evaluation will determine exactly what needs to be done to restore what once was. Noting current conditions establishes a baseline for measuring success of the project. It might involve stabilizing a feature immediately, such as an eroding stream bank. After figuring out what needs to be done, the next step is figuring out how to do it.

In many cases, conservationists will use a reference site similar to what is being restored to determine plants and other features. Plants will influence what kind of animals will begin using the site, but the land and water on the site will determine what plants can live there.

Live willow stake planted to reforest
a former pastureland

A lot of times, restoration work is more than simply replacing plants and animals that lived on a site before people came in and messed it up. A site I monitored in Washington had once been a thriving salmon stream with a wide flood plain. 19^th century farmers drained the area by straitening the stream to allow water to flow in and out faster. They also cleared the trees. Fast forward to the 21^st century, and we’ve figured out that the stream needs to be slowed and shaded. Over a period of several years, the curves were put back in the stream and thousands of new trees and shrubs were planted. Fixing the stream required building temporary dams, removing fish by hand, and using heavy equipment to excavate a new stream bed at just the right depth and slope.

Ohop Creek after being restored to its twisted ways

After work has been completed, the site must be monitored for success. There should be some kind of measurable goal, and even if the restoration fails it can be a lesson for future attempts. The site I mentioned was restored for salmon habitat, and while it will take a few years for trees to begin cooling the water temperature, it has been under constant observation since work began. Several times a year, conservation groups involved in the restoration work check water levels, tree survival, how many salmon are spawning, and what kinds of animals are using the habitat. All of this is checked against initial observations from before the project began.

This prairie, currently a restoration work in progress,
was a field of weeds a few years ago

My work with habitat restoration has been monitoring (documenting wildlife and animal signs, as well as plant survival rates), site maintenance, and invasive species removal. The work is hard and sometimes conditions are brutal, but I find it to be very rewarding.

In many cases, restored habitat is second rate compared to what it once was and what nature has provided. It’s not for a lack of trying, but nature is a much better architect of natural features than what man could ever hope to be. But it’s better than nothing.

Conservation or Preservation

Conservation and preservation are two tools for environmental protection. They are similar, and many people use the terms interchangeably. The term “conservation” is most frequently used, however. What are the differences, though?

First we’ll look to the federal government for the differences. The US Forest Service practices conservation, while the National Park Service practices preservation. Both agencies protect natural resources, but in different ways and for different reasons.

National Forests were set aside and are managed for conservation. For the most part, they are working forests. The resource (timber) is being conserved- managed logging that ensures there will always be a supply. Certain areas are off-limits to logging for various reasons such as habitat protection or recreation.

National Parks were created “for the benefit and enjoyment of the people”, and in the early days pretty much any enjoyment was acceptable, right up to feeding the bears. As we’ve discovered what damage we’ve caused to the environment, NPS cares less about having all the fun and more about preserving ecosystems and ecological processes. In this sense, preservation- protecting and maintaining the environment- is what many people see as conservation.

The environmental toolbox also includes restoration and enhancement. Restoration is returning a damaged or degraded ecosystem to its former glory. This is a difficult task and rarely achieves perfection because nature is much better at building a system than we are at replicating one. An example of a successful restoration project is at Washington’s Billy Frank Jr Nisqually National Wildlife Refuge. The original coastal wetlands were diked and drained for agriculture. In recent years, the dikes were removed and the tide was allowed to reclaim its former marsh. Salmon took advantage of the new channels that formed. Shorebirds enjoy having a shore again.

Incoming tide at Nisqually's restored tidal wetlands

Enhancement makes improvements to a functional ecosystem. For an example, we’ll return to Washington and visit a tributary of the Nisqually River, the Mashel River. Also a salmon-bearing river, a coalition of public and private agencies put artificial log jams in the river to improve habitat for juvenile salmon. Large woody debris adds nutrients to the river and also creates slower moving, deep pools that give fish a place to rest and hide during flood events. The log jams also reduce erosion by forcing the water to slow down.

Engineered log jam on the Mashel River

You can see an area of calmer water behind the log jam

Even without owning lots of land rich with natural resources, you can still practice conservation and preservation. Conserve water, soil, fuel, and energy. Preserve or enhance the ecology of your property. Resources are available if you need guidance. Ask me for details! 

Winter Adaptations

As I deal with a pair of winter storms over the course of writing this blog, I am sitting cozy and warm inside my house. How do animals, who don’t live in houses with central heating or furnaces make it through the winter? Some migrate to warmer areas, but those that stay behind have special adaptations that help them cope with the cold and snowy weather.

Many animals go into mega energy conservation mode during the winter because not only do they lack heating systems for their homes, they also lack supermarkets that carry a reliable food source. For herbivores, their plant-based food supply is either dormant (and not producing the nutritious shoots they crave), or buried under snow and ice. Whether warm-blooded or cold-blooded, both need to keep warm to survive. Cold-blooded critters rely on the sun’s radiant heat to stay warm, and this is a challenge when it’s cold outside and the sun isn’t reliable. Warm-blooded critters metabolize food to stay warm- they eat much more than cold-blooded ones. One option to keep up metabolism is to spend energy to search for scarce food. But there are other ways to get by.

Hibernation is probably the first coping mechanism you think of, and it’s quite common in the mammal world. Bears do it, bats do it. What is it, compared to normal sleep? When you go to sleep your body slows down. Breathing and heart rate go down and metabolism slows, and your body temperature cools a bit. Hibernation is an extreme version of this. But to be asleep for weeks or months on end requires quite a bit of sustaining energy, even if bodily functions slow to the point of nearly stopping. That’s why bears go on a feed frenzy each fall, gorging themselves on spawning salmon or high-energy moths if they live in the right place.

NPS graphic of a hibernating bear

For those that don’t hibernate, finding food is a priority. Arctic foxes and snowshoe hares both grow a white coat for snow camouflage. The fox uses its camo to hunt; the hare uses its to avoid being eaten. The bison uses its large head as a snowplow to uncover buried vegetation. Ever wonder what that large hump at its shoulder is? Extra muscles to support all that head.

Snowshoe hare (Montana Fish, Wildlife, and Parks)

Bison plowing for food (NPS)

Preserving body heat is a great way to maximize caloric efficiency. The thick fur coat of a muskox traps body heat. Blubber insulates whales, seals, and walruses. Polar bears have black skin that absorbs heat, and their fur traps heat, including body heat that they radiate.

Walruses (US Fish and Wildlife Service)

Ease of mobility is also an efficiency adaptation. Lynxes and caribou both have large feet that act as snowshoes, making it easier to get around so they burn fewer calories doing so.

Check out the foot on that lynx! (Natural Resources Research Institute)

These are just a few of the many adaptations that make survival possible for warm-blooded mammals. There are others, and there are also adaptations for cold-blooded animals (like a frog with antifreeze in its blood) and plants too! Enjoy your heater for the rest of the winter! 

Endangered Species

This week Nature Minute will take a look at something most have never seen before- endangered species. You may have seen one or two because there are so many species that are endangered, but most likely not because there are so few of each species. They come in all shapes and sizes, from lichens to flowers to trees and from insects to corals to snails to whales.

In legal terms, an endangered species is defined by the Endangered Species Act (ESA) as being in danger of becoming extinct. A companion term in ESA is a threatened species, which is under threat of becoming endangered. ESA requires protection for endangered and threatened species as well as their habitat, because how can a species survive without having a place to live?

While ESA is an American law, it also extends global protection to species listed as threatened or endangered wherever they may be found. For example, the cheetah is listed as a foreign endangered species. While US laws regarding the conservation of cheetahs and their habitat can’t be enforced in Africa, the extent of the law here at home prohibits trafficking in them and other foreign endangered species.

Currently there are close to 2000 threatened and endangered species just in the US. When a species is listed, the appropriate state and federal agencies must develop a recovery plan. The recovery plan outlines how to increase the species population and preserve habitat and specifies a target population to be considered sustainable so the species can be delisted. Lead federal agencies that oversee ESA listing and recovery plans are the US Fish and Wildlife Service for terrestrial species and National Marine Fisheries Service works with oceanic critters. Both partner with state fish and wildlife agencies, local and tribal governments, private organizations.

My time in the field gave me the opportunity to work on conservation projects aimed at species recovery. I was even lucky enough to see some of the species I was trying to help.

In the US, four of the five Pacific salmon species (pinks are excluded) are listed as threatened or endangered. I volunteered with the Nisqually Land Trust, an organization that works to preserve and enhance salmon habitat. Although the salmon is a fish, salmon habitat begins with healthy forests that keep the rivers cool and clean.

Chinook salmon returning to spawn

I also volunteered with the Center for Natural Lands Management on two prairie preserves. I removed invasive blackberries and Scotch broom from the Glacial Heritage Natural Area and also collected wildflower seeds from there and the Mima Mounds Natural Area. The work I did was to open space for native plants to grow and collect seeds for propagation at other sites. The prairies are home to the endangered Taylor’s checkerspot butterfly, Mazama pocket gopher, and golden paintbrush, a flower. 

Golden paintbrush

Mazama pocket gopher (US Fish and Wildlife)

Taylor's checkerspot (US Fish and Wildlife)

My list of endangered species that I’ve seen in their natural habitat is short, but probably longer than most other people’s. I’ve seen the beluga whale (Alaska), golden paintbrush (Washington), Chinook salmon (Washington), black-footed ferret (South Dakota), and West Indian manatee (Florida).

Black-footed ferret (National Park Service)

West Indian manatee

I am glad that we have ESA to protect endangered species. Several, such as the bald eagle and the alligator, are considered recovered and have been delisted. The road to recovery takes a long time, and sadly the list gets longer as new species are added before the existing species recover. 

Bald eagle

American alligator (National Park Service)

My only regret about ESA is that it takes a reactive approach to protecting species with critically low populations, rather than a proactive approach that prevents them from needing to be listed in the first place. For more information on the Endangered Species Act visit the US Fish and Wildlife website here.

Species of the Month

September’s Species of the Month is our first fish to be featured. Pink salmon are returning to their birth rivers along the Pacific coast. They are the smallest and most abundant of the five Pacific salmon species found in North America. When you buy canned salmon, it is most likely pink. Besides feeding us, they also support entire ecosystems.

Scientific name: Oncorhynchus gorbuscha

Kingdom: Animalia (animals)

Class: Teleostei (ray-finned fishes)

Order: Salmoniformes (salmons)

Range: Northern Pacific Ocean from East Asia to California and upstream

Habitat: Rivers and ocean

Lifespan: Two years typically, some may live three years

Diet: Insects and plankton (juvenile) and fish (adult)  

Predators: Bears, killer whales, osprey, eagles, sea lions, seals

Conservation Status: No special conservation status

Other Information: Pink salmon is an anadromous fish, meaning it is born in freshwater then moves to a saltwater phase before returning to the stream it hatched in to spawn. These fish typically spawn close to saltwater, sometimes even in the saltwater. After hatching, the salmon fry immediately swim downstream to the ocean. Pinks are also known as humpies, named for the large hump spawning males grow on their backs. The two-year life cycle of the pinks is the only completely predictable salmon life cycle. Other species may spend 2-5 years at sea, depending on the species and the individual. Pinks, like other salmon, are an important food source for bears fattening up for winter. They are also incredible swimmers, amazingly agile in just a few inches of water. I walked in the river with them and despite their fins being above the surface and my longer stride, I was unable to keep pace with them. Due to low river levels followed by flooding that affected the 2015 spawners, the 2017 pink salmon run is forecasted to be a fraction of the previous run.

Info this week is from USGS  and Alaska Department of Fish and Game.

Spawning female pink salmon, Mashel River 2015

Spawning male pink salmon, Mashel River 2015

Keep Bugging Me

Plants are important to life on Earth. They put oxygen in the atmosphere as a byproduct of photosynthesis. Everyone has to eat, and plants for the base of the food chain. Just as important, and either overlooked or swatted aside, are insects. I consider insects to be the second lowest man on the food chain totem pole as they are super abundant and are the prey of choice for many of the first order predators. In addition, many of them support plant life by serving as pollinators. Others are beneficial because they eat other insects that are crop pests. 

Hoverfly working hard to pollinate

Fritillary butterfly pollinating

I never saw this little pollinator before today

Insect larvae, such as fly maggots or aquatic larva such as mayfly and caddisfly larva, play an important role in the nutrient cycle, breaking down dead plant and animal matter and cycling it into the soil for plants or cycle it even higher in the food chain by being eaten by something bigger than a plant.

Aquatic insect larvae are important indicators of ecosystem health. The absence or presence of certain bugs in the water can tell researchers a lot about water quality. Data collected from stream bug surveys can be used in habitat restoration and conservation projects. 

Caddisfly larvae, an important salmon food

Water strider- fish food

Insects are a great teaching tool. When my daughter was little, insects were her introduction to nature. They are lightweight, portable, easy to catch, and almost everywhere so there was always an opportunity to teach her something new. 

A ladybug, one of my daughter's favorites when she was little

Many of the birds we enjoy seeing or hearing eat insects. Salmon are commercially important fish species that depend on insects and/or insect larva in their early stages of life. The flowers in your garden, not to mention many crops, are there because of insects. Next time you eat an apple, smell a rose, or hear your favorite bird hug a bug! 

Unknown tiny insect that landed on my shirt one day

Bee on its 10 minute break

Praying mantis or preying mantis?

Still Hungry, Bearly Full

Time for a look at one of America’s most charismatic critters, the bear. We have three bear species (not Papa, Mama, and Baby). They are the black bear, which is the most wide-ranging, the grizzly, and the polar bear.

Grizzly bear (UNAGB)

Polar bear (Scientific American)

Black bear (ABC News)

Bears are omnivores, meaning the eat plant and animal products. Always the opportunists, they won’t hesitate to raid a dumpster or campsite. One of the reasons wildlife managers discourage you from feeding the bears is because they will learn to equate people with food. Once bears start looking for people, problems arise.

Processed bear food

Bears are very large, so it takes quite a bit of food to keep them going. Grizzlies and black bears sleep through most of the winter (called torpor- not all of them hibernate all the way through) and that helps them by not eating when food sources are most scarce. The rest of the year, they are eating to make up for their long winter’s nap. Sometimes bears will strip the bark from a tree and power up with sugary sap when they first emerge from torpor.

Tree sap breakfast nook

From then on, they are pretty much fattening up for the winter. In the Northwest (including Alaska and Pacific Canada), bears get a big boost of tasty fat in the form of salmon, which return to spawn just before bear bedtime. In the Rockies, an infusion of migratory moths makes an easy treat for the bears that know where to look. The salmon and moths giving the bears a goodnight kiss is another example of nature’s perfect timing.

Photo credits: 

Grizzly: United Nations Association of Great Boston https://unagb.wordpress.com/tag/grizzly-bears/

Polar bear: Scientific American https://www.scientificamerican.com/article/polar-bears-diverged-from-brown-bears-fairly-recently/

Black Bear: ABC News http://abcnews.go.com/US/florida-black-bear-takes-break-rests-hammock/story?id=23940797

The Urban Wilderness

A few weeks ago, I mentioned some of the animals of the urban wilderness, those that have adapted extremely well to life with humans. This week I’ll share some wild urban spaces, little patches of actual jungle in the urban jungle. Note: the actual jungle I refer to isn’t really a jungle.

The Seattle area where I live is home to quite a few wild spots in not so wild areas. I’ll run through some of the ones I have been to. 

Tacoma’s Point Defiance Park is one of the largest city parks in Washington. It has Puget Sound shoreline, which is hope to marine life such as harbor seals and giant Pacific octopi. It also has some old growth forest, home to black-tailed deer and eagles. Other attractions include the zoo and Fort Nisqually. 

Not-so-giant giant sequoia at Point Defiance

The recently renamed Billy Frank Jr. Nisqually National Wildlife Refuge preserves the delta of the Nisqually River. Located between Olympia and Tacoma, it is bordered by Interstate 5. With freshwater and saltwater marshes it is an important stop on the Pacific Flyway and its estuarine waters nurture salmon smolts adjusting to seawater. 

Taking flight at Nisqually National Wildlife Refuge

The US Army Corps of Engineers’ Hiram Chittenden Locks provides a channel for boats to travel between Lake Washington and Puget Sound. On the west side of the locks is a rookery of great blue herons, the only place I’ve ever seen one. Harbor seals frequent the locks, hoping to snag a migrating salmon. Salmon are visible at the lock’s fish ladder. 

Great blue heron rookery

Sockeye salmon at the fish ladder

I grew up near Philadelphia, and there are some urban wilderness areas there also. John Heinz National Wildlife Refuge is right alongside Interstate 95, just south of the airport. It is one of the last remaining tidal marshes on the Delaware River and an important bird habitat. 

John Heinz National Wildlife Refuge (US Fish and Wildlife Service photo)

Valley Forge National Historical Park is best known as the location of George Washington’s winter camp during the American Revolution. Now completely surrounded by suburban development, it is a haven for white-tailed deer. I’ve also seen turkey vultures and heard turkeys there. 

Colonial Springs, deep in the woods (right off the highway) at Valley Forge

New York, the largest city in the country, even has some wild spaces. Central Park is home to more than just pigeons. I’ve seen a woodpecker and squirrels there. Migrating birds on the Atlantic Flyway probably stop there from time to time. The Oakwood Beach neighborhood of Staten Island is no longer a neighborhood; home have been bought out following Hurricane Sandy. The area is already reverting to nature. Across New York Harbor, New Jersey’s Sandy Hook boasts a rare intact holly forest, as well as coastal dunes. Imagine my delight watching crabs skittering through the woods. 

A woodpecker grows in Manhattan

Holly forest at Sandy Hook (Middletown, NJ Patch photo)

One last place worth mentioning is Springbrook Nature Center in Minneapolis. I’ve never been there but a friend is there frequently. It is home to many species of birds, plus the usual deer and even foxes. With any luck I will get there some day. 

Springbrook Nature Center (photo by Mark Layeux)

What are some surprisingly wild places near you?

US Fish and Wildlife Service: https://www.fws.gov/refuge/John_Heinz/visit/plan_your_visit.html

Middletown, NJ Patch: https://patch.com/new-jersey/middletown-nj/holly-forest-walk-at-sandy-hook

Marsh Madness

One of the most important habitats is wetlands, where the only buzzer-beater you’re likely to find here is when you swat at a mosquito or fly. Among the most productive of all ecosystems, wetlands provide food, water, and shelter for a dazzling array wildlife. Additionally, wetlands benefit people too. Besides recreational opportunities, wetlands provide flood control and water filtration. Not only are there freshwater and saltwater wetlands, but different varieties of each.  

Salt marshes are wetlands that flood with salt water at high tide. Obviously, they are found in coastal areas. They are a common feature in estuaries, areas where salt water mingles with fresh water. They are important habitat for seafood, including salmon, shrimp, and crab. The food our food eats is what draws them there (and the young salmon acclimate to the salt water), but they draw the critters that eat them. Salt marshes are important habitat for resident and migrating shore birds.

Saltwater marsh, Puget Sound

Saltwater marsh, Puget Sound

Freshwater wetlands are more varied. They include bogs, swamps, fens, and seasonal wetlands. Even shallow ponds are considered wetlands. The pond where I conduct my amphibian egg survey is considered wetlands.

Shallow pond freshwater wetland

Freshwater wetlands perform the important ecosystem services of flood control and water filtration. Wetlands do this by impounding rainwater and slowly releasing it downstream or absorbing it into the soil. They filter water by allowing sediments and pollutants settle out. Low water velocity lacks the necessary energy to carry those particles.

Like their salty counterparts, freshwater wetlands host a diverse community. In my pond, I have found two species of salamanders; three species of eggs; one species each of fish, freshwater shrimp, and snake; a river otter; insects galore; and birds too numerous to count. I have also seen deer and elk, coyote, and raccoon tracks and scats near the pond. I have no doubt that these critters are drinking from the pond.

Wet meadow wetland, Mount Rainier National Park

Just this morning I found myself in wetlands once again. This time the focus was on remove protective plastic tubes from trees that were planted three years ago. This site is in Washington’s Ohop Valley. The wetlands are seasonal freshwater, and since this is the rainy season the lands were wet. I didn’t notice much wildlife since I was looking down, but I did happen to see a ton of spiders and elk tracks and scats. The trees are important because they will shade out the invasive reed canary grass (which is swallowing everything) and cool the water temperature in the stream for the salmon. Water tolerant species such as willows were the most common tree I saw, and there were some others I didn’t recognize without leaves in the higher and drier areas.

Next time you drive past a soggy area, don’t be repulsed. Thank a wetland for your seafood and drinking water. Give a hoot and help protect our wetlands! Salt march information comes from our friends at the National Oceanic and Atmospheric Administration, while Washington State Department of Ecology provided information on freshwater wetlands ecosystem services.

NOAA (salt marshes)

WA Ecology (water filtration)      

Some days you're the windshield, some days you're the bug

I was driving home from work last week and noticed what appeared to be a moth, judging by the face, stuck on my windshield wiper. The wings were flapping wildly in the breeze. When I got to a red light, they didn’t look like moth wings and I could see the legs were moving. This bug was still alive and trying to escape. I pulled over at the next chance I could so I could free this mystery critter. I wasn’t sure what I was looking at (or how it was still alive; half its body was smashed) until I happed upon it in a book I was flipping through. It was a caddisfly.

What is a caddisfly? They are an order of insect (Trichoptera) that is similar to moths and butterflies (order Lepidoptera) with hairy heads and larval cocoons. However, the caddisfly larva lives underwater and makes its case from material in the stream, such as small pebbles, held together by silk that it secretes from glands. And unlike moths, the wings of a caddisfly are not covered in fine scales (the “powder” that gets on your fingers if touch a moth or butterfly’s wings).₁

Caddisfly larva, with and without case
South Dakota Game, Fish, and Parks

Adult caddisfly
Pennsylvania Fish and Game Commission

Caddisfly larvae are a favorite meal for aquatic critters like salmon. An entire cohort of caddisflies emerges from their cases at once and moves toward the surface to begin a brief (two weeks) adulthood. It becomes a veritable smorgasbord for fish. Caddisflies are also an important indicator species. An indicator species is one that’s absence or presence is an indicator of the general health of an ecosystem. Caddisflies are sensitive to water pollution, so an abundant population of caddisflies is a sign of a healthy stream.2

Caddisfly larvae, Mashel River

1 From Insects_, Their Natural History and Diversity by Stephen A Marshall

2 From The Northwest Coastal Explorer by Robert Steelquist