Results 51 to 60 of about 739,700 (305)

Human THO–Sin3A interaction reveals new mechanisms to prevent R-loops that cause genome instability [PDF]

open access: yes, 2017
R-loops, formed by co-transcriptional DNA–RNA hybrids and a displaced DNA single strand (ssDNA), fulfill certain positive regulatory roles but are also a source of genomic instability.
Aguilera López, Andrés   +5 more
core   +1 more source

Effects of Red-Backed Salamanders on Ecosystem Functions [PDF]

open access: yes, 2014
Ecosystems provide a vast array of services for human societies, but understanding how various organisms contribute to the functions that maintain these services remains an important ecological challenge.
Babbitt, Kimberly J., Hocking, Daniel J.
core   +6 more sources

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents. [PDF]

open access: yes, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Biggs B., Lester P. J., Main M. L.
core   +2 more sources

An integrated population model reveals source-sink dynamics for competitively subordinate African wild dogs linked to anthropogenic prey depletion.

open access: yesJournal of Animal Ecology
Many African large carnivore populations are declining due to decline of the herbivore populations on which they depend. The densities of apex carnivores like the lion and spotted hyena correlate strongly with prey density, but competitively subordinate ...
S. Creel   +6 more
semanticscholar   +1 more source

Gut evacuation rate as a tool for revealing feeding patterns in the invasive round goby (Neogobius melanostomus) under different feeding modes, food types and temperatures [PDF]

open access: yesAquatic Invasions
The round goby (Neogobius melanostomus) is a well-known invasive fish. Knowledge of its feeding habits and means of food processing is key in understanding its impact on aquatic food webs.
Natalia Z. Szydłowska   +6 more
doaj   +3 more sources

Impacts of fisheries on seabird communities

open access: yesScientia Marina, 2003
Long-line by-catch of albatrosses and petrels may soon lead to species extinctions. Set-net bycatch has caused major reductions in certain seabird populations. Some fisheries may decrease numbers of seabirds by reducing abundance of prey-fish.
Robert W. Furness
doaj   +1 more source

Competition between sympatric wolf taxa: an example involving African and Ethiopian wolves [PDF]

open access: yesRoyal Society Open Science, 2018
Carnivore populations are declining globally due to range contraction, persecution and prey depletion. One consequence of these patterns is increased range and niche overlap with other carnivores, and thus an elevated potential for competitive exclusion.
Tariku Mekonnen Gutema   +9 more
doaj   +1 more source

Painted Ferocity: The Social Behaviors of African Wild Dogs, Threats to Survival, and Resulting Conservation Initiatives [PDF]

open access: yes, 2018
African Wild Dogs (Lycaon pictus) are an endangered species of canid from Sub-Saharan Africa. They are very social communal hunters, and are capable of chasing down prey for long stretches of time. Wild dogs benefit a savannah ecosystem by regulating the
Valdes, Alexis
core   +1 more source

Will improving wastewater treatment impact shorebirds? Effects of sewage discharges on estuarine invertebrates and birds [PDF]

open access: yes, 2012
Human communities often discharge wastewaters into estuaries, influencing their organic and pollutant loading, benthic community and trophic structure.
Ait Alla   +45 more
core   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

open access: yesFEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho   +3 more
wiley   +1 more source

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