28 Nov 2016: Report

How Warming Threatens the Genetic
Diversity of Species, and Why It Matters

Research on stoneflies in Glacier National Park indicates that global warming is reducing the genetic diversity of some species, compromising their ability to evolve as conditions change. These findings have major implications for how biodiversity will be affected by climate change.

by jim robbins
Back to the article >>

 

COMMENTS | POST A COMMENT


Dams, Diversity, Redband Trout and Steelhead

There is no one action that will save ESA-listed
Snake River Steelhead. Dams, reservoirs,
hatcheries, and eliminated upstream spawning
grounds are all parts of the problem and have to
be dealt with to stop the long slide to extinction
of wild sustainable runs. The dams and their
reservoirs have and continue to interfere with
migration. Genetic diversity has and is being
reduced by both the dams, the hatcheries, and
management of upstream tributaries.

The Hells Canyon Complex of dams blocked
spawning migrations to headwater streams and
eliminated the genetic diversity provided by the
large number of distinct populations above them.
The blocked upstream migrating spawners were
captured and spawned together in hatcheries
without regard to their parental diversity.
Steelhead were that portion of the residual
Redband Trout population that migrate to the sea
to mature from each of the upstream tributaries
they are products of the same genetic
parentage. That is why it is important to maintain
suitable flows and water quality in the ancestral
drainages of those distinct populations. Those
Redband Trout populations should be receiving
the same ESA protection and concern that the
declining Snake River Steelhead are receiving
for their potential to restore genetic diversity
essential for recovery of Steelhead runs.

Those issues should all be receiving the attention
of the litigation being presented in the Courts.
Posted by Dr. D.W. Johnson, Emeritus Fisheries Scientist on 29 Nov 2016


POST A COMMENT

Comments are moderated and will be posted if they are on-topic and not abusive. They may be edited for length and clarity. By filling out this form, you give Yale Environment 360 permission to publish this comment.

Name 
Email address 
Comment 
 
Please type the text shown in the graphic.


Yale
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
.

SEARCH e360



Donate to Yale Environment 360
Yale Environment 360 Newsletter


CONNECT


ABOUT

About e360
Contact
Submission Guidelines
Reprints

E360 en Español

Universia partnership
Yale Environment 360 articles are now available in Spanish and Portuguese on Universia, the online educational network.
Visit the site.


DEPARTMENTS

Opinion
Reports
Analysis
Interviews
Forums
e360 Digest
Podcasts
Video Reports

TOPICS

Biodiversity
Business & Innovation
Climate
Energy
Forests
Oceans
Policy & Politics
Pollution & Health
Science & Technology
Sustainability
Urbanization
Water

REGIONS

Antarctica and the Arctic
Africa
Asia
Australia
Central & South America
Europe
Middle East
North America

e360 VIDEO

“video
A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast.
Watch the video.

e360 MOBILE

Mobile
The latest
from Yale
Environment 360
is now available for mobile devices at e360.yale.edu/mobile.

e360 PHOTO ESSAY

“Alaska
An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S.
View the photos.

e360 VIDEO

“Ashaninka
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging.
Learn more.

e360 VIDEO

Food waste
An e360 video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs.
Watch the video.

e360 VIDEO

Choco rainforest Cacao
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.

e360 VIDEO

“video
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land.
Watch the video.

OF INTEREST



Yale