Showing posts with label birds. Show all posts
Showing posts with label birds. Show all posts

Thursday, October 27, 2022

Is Forest Thinning Beneficial for Everyone?

 This Undark article says Pinyon jays are proposed for ESA listing because of forest restoration thinning:

“some bird biologists... are sounding the alarm that even today’s thinning methods degrade pinyon jay habitat. These woodlands are already under extreme drought stress, especially in New Mexico, with predictions for widespread loss due to climate change. And some studies suggest thinned piƱon-juniper forests are less resilient to beetle infestation and drought.


 I participated in a 10-year monitoring study of thinned and unthinned Pinyon-Juniper woodlands in the Manzano mountains.  Our findings were different from those discussed in the study; we found increased soil moisture at thinned plots, which led to richer pinyon nut crops and an increase in pinyon jays.  






However, I'm not arguing that the cited studies are wrong; there may be important site-specific differences between different restoration treatments in different areas.    Some restoration can actually help pinyon jays, we just need to figure out which treatments, and how!

Hopefully, we can all agree that if a treatment isn't making things better for native plants and animals we need to rethink it; just because something is called "restoration" doesn't mean its automatically good.  That's why we need science like this.

Citation.

Sunday, November 23, 2014

"Fewer than 5,000 remain"

The U.S. Fish and Wildlife Service recently listed the Gunnison Sage Grouse as "Threatened" under the Endangered Species, act, one step shy of being actually "Endangered".  The ESA specifically prohibits killing a species listed as Threatened or Endangered.


The outcry has been significant, to the point that the Colorado Governor (a Democrat) is preparing a lawsuit in opposition. (Durango Herald)

Only a few scattered subpopulations currently remain out of the historic vast swath of occupied habitat.  Source: WildEarth Guardians Species Fact Sheet


The largest population, in the Gunnisun Basin, appears to be stable and not at risk, but many of the subpopulations continue to shrink.  Source:  USFWS Fact Sheet.



A chart of the small subpopulations showing overall decline since the late 1990's.  Since 2011 there appears to be a promising increase.

However, because the Gunnison population has increased since the 1990's and makes up the largest share of the total population, the total population has increased since 1996.