Biologia Evolutiva, Ecologia i Ciències Ambientals: Enviaments recents
Ara mostrant els elements 21-40 de 1903
Postharvesting population dynamics of the South American sea lion (Otaria byronia) in the southwestern Atlantic
Many pinniped populations precipitously declined during the 19th and 20th centuries due to overharvesting. In Uruguay, the South American sea lion (SASL) was harvested until 1986. Birth rates in two nearby breeding colonies ...
Diet-to-female and female-to-pup isotopic discrimination in South American sea lions
Rationale: The use of accurate, species-specific diet-tissue discrimination factors is a critical requirement when applying stable isotope mixing models to predict consumer diet composition. Thus, diet-to-female and ...
Use of epidermis for the monitoring of tissular trace elements in Mediterranean striped dolphins (Stenella coeruleoalba)
Trace elements accumulate in epidermis, liver, kidney and muscle tissues in cetaceans. However, contrarily to internal tissues, epidermis can be sampled using minimally-invasive techniques. We investigate the patterns of ...
Dietary consistency of male South American sea lions (Otaria flavescens) in southern Brazil during three decades inferred from stable isotope analysis
Marine predators may undergo remarkable dietary changes through time as a result of both anthropogenic and natural changes in the environment, but this variability is often difficult to tackle and seldom incorporated into ...
Concentrations of mercury in tissues of striped dolphins suggest decline of pollution in Mediterranean open waters
The Mediterranean is a semi-enclosed sea subject to high mercury (Hg) pollution from both natural and anthropogenic sources. With the objective of discerning temporal changes in marine Hg pollution in the oceanic waters ...
Prey dynamics and breeding performance in a generalist predator: the differential role of prey densitiy, biomass, and effective consumption rates
The breeding performance of predators is influenced by the differential consequences of prey density, prey biomass and effective consumption rates. Using camera traps at nests, we investigated whether changes in prey ...
Lithium response in bipolar disorder: Epigenome-wide DNA methylation signatures and epigenetic aging
Lithium (Li) is the first-line treatment for bipolar disorder (BD) even though only 30 % of BD patients are considered excellent responders. The mechanisms by which Li exerts its action are not clearly understood, but it ...
Religion and Fertility patterns: comparison of life history traits in Catholics and Protestants, Hallstatt (Austria) 1733-1908
Catholicism and Protestantism have different ways of promoting the family unit that could influence survival and fertility at a population level. Parish records in the Austrian village of Hallstatt allowed the reconstruction ...
Increased rhizosphere populations of Trichoderma asperellum strain T34 caused by secretion pattern of root exudates in tomato plants inoculated with Botrytis cinerea
Root exudates secreted from plants can modify rhizosphere microbiota by enhancing or inhibiting the growth of biological control agents (BCAs) and/or pathogens. Similarly, microorganisms can modify the secretion of plant ...
Regional tree line dynamics in response to global change in the Pyrenees
1 Many studies in northern Europe, North and South America, describe regional trends of population densification at altitudinal and polar tree lines during the 20th century. The purpose of this study was (1) to ascertain ...
Current regeneration patterns at treeline in the Pyrenees indicate similar recruitment processes irrespective of past disturbance regime
Aim: Impacts of global change, such as land-use and climate changes, could produce significant alterations in the elevational patterns of alpine tree line ecotones and their adjacent vegetation zones. Because the responses ...
MEDFATE 2.9.3: a trait-enabled model to simulate Mediterranean forest function and dynamics at regional scales
Regional-level applications of dynamic vegetation models are challenging because they need to accommodate the variation in plant functional diversity, which requires moving away from broadly defined functional types. ...
Seedling recruitment, survival and facilitation in alpine <em>Pinus uncinata</em> treeline ecotones. Implications and potential responses to climate warming
Aims: Alpine tree line ecotones are harsh environments where low temperatures constrain tree regeneration and growth. However, the expected upward shift of tree line ecotones in response to climate warming has not been ...
Activity and space patterns of Pyrenean desman (Galemys pyrenaicus) suggest non-agressive and non-territorial behaviour
The Pyrenean desman is considered a flagship species for biodiversity and evolution. However, its scientific knowledge is still under development and currently on debate, particularly in relation to its behavioural ecology ...
Is the standard Eurasian otter Lutra lutra survey strategy suitable for surveying the American mink Neovison vison?
The American mink Neovison vison is an elusive mustelid that is monitored mostly through the detection of its field signs, namely, footprints and scats. In Europe, the American mink has been often monitored using the ...
New insights into social and space use behaviour of the endangered Pyrenean desman (<em>Galemys pyrenaicus</em>)
We describe novel aspects of the social organisation of the Pyrenean desman, Galemys pyrenaicus, by studying home range and shelter use behaviour in a local population. A total of 45 individuals were trapped of which 20 ...
Causes and patterns of human-induced mortality in the Critically Endangered European mink Mustela lutreola in Spain
Human intervention is the main cause of the decline of the Critically Endangered European mink Mustela lutreola. In this study we analysed the main causes of direct human-caused mortality of the species in Spain. A total ...
Morphological variation of introduced species: the case of American mink (Neovison vison) in Spain
We studied the morphology of American mink Neovison vison in five out of the six introduced populations in Spain. The spatial and temporal variation of body weight (BW), body length (BL), tail length, hind-foot length and ...
Evaluating the effect of <em>American mink</em>, an alien invasive species, on the abundance of a native community: is coexistence possible?
Loss of biodiversity due to biological invasions is one of the most critical issues our society is facing. American mink is one of the most nefarious invasive non-native species and has major consequences for diversity, ...
Molecular evidence for the intermediate disturbance hypothesis in an acidified marine system
The Intermediate Disturbance Hypothesis (IDH), postulated by Connell (1978), suggests that ecosystems exhibit higher species diversity when disturbances occur at intermediate scales. In this study, the applicability of the ...
