Anthropogenic and natural stressors often interact to affect organisms. Amphibian populations are undergoing unprecedented declines and extinctions with pesticides and emerging infectious diseases implicated as causal factors. Although these factors often co-occur, their effects on amphibians are usually examined in isolation. We hypothesized that exposure of larval and metamorphic amphibians...
Full Text:
Julia C. Buck1,2*, Jessica Hua3¤a, William R. Brogan, III3¤b, Trang D. Dang2, Jenny Urbina4,
Randall J
Polycyclic aromatic hydrocarbons (PAHs) are priority environmental contaminants that exhibit mutagenic, carcinogenic, proinflammatory, and teratogenic properties. Oxygen-substituted PAHs (OPAHs) are formed during combustion processes and via phototoxidation and biological degradation of parent (unsubstituted) PAHs. Despite their prevalence both in contaminated industrial sites and in urban air, OPAH mechanisms of action...
Research on regulatory mechanisms in biological populations often focuses on environmental covariates. An integrated
approach that combines environmental indices with organismal-level information can provide additional insight on
regulatory mechanisms. Survival of spring/summer Snake River Chinook salmon (Oncorhynchus tshawytscha) is consistently
low whereas some adjacent populations with similar life histories experience...
Full Text:
.
B
io
lo
g
ic
al
ch
ar
ac
te
ri
st
ic
s
o
f
Sn
ak
e
R
iv
e
r
sp
/s
u
C
h
in
o
o
k
sa
Meta-analyses of field studies have shown that biomass, density, species richness, and size of organisms protected by no-take marine reserves generally increase over time. The magnitude and timing of changes in these response variables, however, vary greatly and depend upon the taxonomic groups protected, size and type of reserve, oceanographic...
Polycyclic aromatic hydrocarbons (PAHs) are priority environmental contaminants that exhibit mutagenic, carcinogenic, proinflammatory, and teratogenic properties. Oxygen-substituted PAHs (OPAHs) are formed during combustion processes and via phototoxidation and biological degradation of parent (unsubstituted) PAHs. Despite their prevalence both in contaminated industrial sites and in urban air, OPAH mechanisms of action...
Full Text:
Oxygenated PAHs
Goodale, B. C., La Du, J., Tilton, S. C., Sullivan, C. M., Bisson, W. H., Waters, K.
M
Mortality and injuries caused by ship strikes in U.S. waters are a cause of concern for the endangered population of blue
whales (Balaenoptera musculus) occupying the eastern North Pacific. We sought to determine which areas along the U.S.
West Coast are most important to blue whales and whether those areas...
Full Text:
, from a small (,7 m) rigid-
hulled inflatable boat, using either a 68-kg modified Barnett
crossbow
Genetic factors such as decreased genetic
diversity and increased homozygosity can have detrimental
effects on rare species, and may ultimately limit potential
adaptation and exacerbate population declines. The Gulf
and Atlantic Coastal Plain physiographic region has the
second highest level of endemism in the continental USA,
but habitat fragmentation and...
Full Text:
0.27 0.14 0.05 0.18 0.18 0.14 - 0.17
Table S2 the optimal log (marginal likelihood) values for K
In many partially glacierized watersheds glacier recession driven by a warming climate could lead to complex patterns of streamflow response over time, often marked with rapid increases followed by sharp declines, depending on initial glacier ice cover and rate of climate change. Capturing such “phases” of hydrologic response is critical...
Full Text:
., Lettenmaier, D. P., Naz, B. S., Clarke, G. K.,
Condom, T., ... & Nolin, A. W. (2015). Predicting glacio
The West Antarctic Ice Sheet Divide (WAIS Divide, WD) ice core is a newly drilled, high-accumulation
deep ice core that provides Antarctic climate records of
the past ~68 ka at unprecedented temporal resolution. The
upper 2850 m (back to 31.2 ka BP) have been dated using
annual-layer counting. Here we...
Climate impact studies often require the selection of a small number of climate scenarios. Ideally, a subset would have simulations that both (1) appropriately represent the range of possible futures for the variable/s most important to the impact under investigation and (2) come from global climate models (GCMs) that provide...
Full Text:
, W. P. Gibson, M. K. Doggett, G. H. Taylor, J. Curtis, and P. P. Pasteris (2008), Physiographically