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Heart Monitors On Wild Narwhals Reveal Alarming Responses To Stress（图）
Heart Monitors Wild Narwhals Alarming Responses Stress
2017/12/19
Narwhals released after entanglement in nets and outfitted with heart monitors performed a series of deep dives, swimming hard to escape, while their heart rates dropped to unexpectedly low levels of ...
Biological Responses in a Dynamic Buoyant River Plume
Biological Responses Dynamic Buoyant River Plume
2015/7/22
Buoyant river plumes are highly dynamic and often characterized by marked physical and chemical gradients that interact to drive biological responses. For example, interactions among factors resulting...
Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability
two dominant Antarctic phytoplankton taxa ocean acidification warming irradiance iron availability
2014/10/16
We investigated the responses of the ecologically dominant Antarctic phytoplankton species Phaeocystis antarctica (a prymnesiophyte) and Fragilariopsis cylindrus (a diatom) to a clustered matrix of th...
The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point
The responses eight coral reef calcifiers increasing partial pressure CO2 do not exhibit a tipping point
2014/4/2
The objective of this study was to investigate whether a tipping point exists in the calcification responses of coral reef calcifiers to CO2. We compared the effects of six partial pressures of CO2(PC...
Population dynamics of a freshwater calanoid copepod: Complex responses to changes in trophic status and climate variability
Population dynamics a freshwater calanoid copepod Complex responses changes in trophic status climate variability
2014/4/21
The long-term dynamics of the calanoid copepod Eudiaptomus gracilis were analyzed in Lake Constance, a deep lake that has been influenced strongly by changes in trophic status and climate variability ...
Change in filter-screen morphology and depth selection: Uncoupled responses of Daphnia to the presence of filamentous cyanobacteria
filter-screen morphology depth selection: Uncoupled responses filamentous cyanobacteria
2014/4/21
In many eutrophic lakes, ability to cope with filamentous cyanobacteria is crucial to Daphnia fitness, as the filaments can reduce food intake by interference with food-particle retention. Two basic m...
Iron limitation across chlorophyll gradients in the southern Drake Passage: Phytoplankton responses to iron addition and photosynthetic indicators of iron stress
Iron limitation chlorophyll gradients in the southern Drake Passage Phytoplankton responses iron addition photosynthetic
2014/4/21
Processes influencing phytoplankton bloom development in the southern Drake Passage were studied using shipboard iron-enrichment incubations conducted across a surface chlorophyll gradient near the An...
Life history responses of Daphnia pulicaria to diets containing freshwater diatoms: Effects of nutritional quality versus polyunsaturated aldehydes
Daphnia pulicaria diets containing freshwater diatoms nutritional quality polyunsaturated aldehydes
2014/5/9
Like marine diatoms, some freshwater diatoms produce α, β, γ, δ-polyunsaturated aldehydes (PUA) when damaged. Some of these oxylipins are suspected of impairing egg viability in marine copepods. To de...
Responses in dissolved nutrients and epilithon abundance to spawning salmon in Southeast Alaska streams
dissolved nutrients epilithon abundance spawning salmon Southeast Alaska streams
2014/5/8
Spawning Pacific salmon (Oncorhynchus spp.) historically transported massive quantities of marine-derived nutrients (MDN) into nutrient-poor streams of the Pacific Northwest. In southeast Alaska, we m...
Responses of elemental and biochemical composition of Chaetoceros muelleri to growth under varying light and nitrate:phosphate supply ratios and their influence on critical N : P
Responses of elemental biochemical composition Chaetoceros muelleri growth under varying light nitrate:phosphate supply ratios their influence critical N : P
2014/5/19
The critical nitrogen-to-phosphorous ratio (N:P) defines the transition between N and P limitation of growth rate and is not a biological constant. To test the effect of environmental conditions on th...
Responses of seagrass communities to fertilization along a gradient of relative availability of nitrogen and phosphorus in a carbonate environment
Responses of seagrass communities to fertilization a gradient of relative availability nitrogen and phosphorus carbonate environment
2014/5/19
Patterns of relative nutrient availability in south Florida suggest spatial differences regarding the importance of nitrogen (N) and phosphorus (P) to benthic primary producers. We did a 14-month in s...
Responses of infaunal populations to benthoscape structure and the potential importance of transition zones
Responses of infaunal populations to benthoscape structure and the potential importance of transition zones
2014/5/20
Relationships between population abundance and seafloor landscape, or benthoscape, structure were examined for 16 infaunal taxa in eastern Long Island Sound. Based on analyses of a side-scan sonar mos...
Responses of Zn assimilation by coastal plankton to macronutrients
Zn assimilation coastal plankton macronutrients
2014/6/9
We examined the Zn uptake in marine diatoms and its transfer to marine copepods under different nutrient-replete and -deplete conditions. Zn uptake, quantified by measurements of both total cellular a...
Zooplankton survival and reproduction responses to damaging UV radiation: A test of reciprocity and photoenzymatic repair
Zooplankton survival reproduction responses damaging UV radiation A test of reciprocity photoenzymatic repair
2014/6/9
As stratospheric ozone concentrations are reduced, exposure of organisms to damaging ultraviolet radiation (UVR) reaching the earth increases. Many organisms can repair DNA damaged by UVR through phot...