نتایج جستجو برای: habitat diversity

تعداد نتایج: 235221  

Journal: :Landscape Ecology 2021

Abstract Context Habitat loss has clear negative effects on biodiversity, but whether fragmentation per se (FPS), excluding habitat does is debatable. A contribution to this debate may be that many studies tend use landscapes of fragmented focal-habitat and a single vastly different species-poor intervening land cover (the matrix). Objectives How matrix composition influence the effect FPS biod...

Journal: :Journal of evolutionary biology 2015
A Kaliontzopoulou M A Carretero D C Adams

Understanding how phenotypic diversity evolves is a major interest of evolutionary biology. Habitat use is an important factor in the evolution of phenotypic diversity of many animal species. Interestingly, male and female phenotypes have been frequently shown to respond differently to environmental variation. At the macroevolutionary level, this difference between the sexes is frequently analy...

Journal: :Proceedings. Biological sciences 2016
Jessica L Hite Jaime Bosch Saioa Fernández-Beaskoetxea Daniel Medina Spencer R Hall

Why does the severity of parasite infection differ dramatically across habitats? This question remains challenging to answer because multiple correlated pathways drive disease. Here, we examined habitat-disease links through direct effects on parasites and indirect effects on parasite predators (zooplankton), host diversity and key life stages of hosts. We used a case study of amphibian hosts a...

2016
Desalegn Chala Christian Brochmann Achilleas Psomas Dorothee Ehrich Abel Gizaw Catherine A. Masao Vegar Bakkestuen Niklaus E. Zimmermann

The main aim of this paper is to address consequences of climate warming on loss of habitat and genetic diversity in the enigmatic tropical alpine giant rosette plants using the Ethiopian endemic Lobelia rhynchopetalum as a model. We modeled the habitat suitability of L. rhynchopetalum and assessed how its range is affected under two climate models and four emission scenarios. We used three sta...

2016
M. H. R E I S K I N D R. H. G R I F F I N M. S. J A N A I R O

Knowledge of the distribution of arthropod vectors across a landscape is important in determining the risk for vector-borne disease. This has been well explored for ticks, but not for mosquitoes, despite their importance in the transmission of a variety of pathogens. This study examined the importance of habitat, habitat edges, and the scale at which mosquito abundance and diversity vary in a r...

2012
Takashi Makino Masakado Kawata

The factors limiting the habitat range of species are crucial in understanding their biodiversity and response to environmental change. Yet the genetic and genomic architectures that produce genetic variation to enable environmental adaptation have remained poorly understood. Here we show that the proportion of duplicated genes (P(D)) in the whole genomes of fully sequenced Drosophila species i...

Journal: :Ecology letters 2009
Paul E Gribben James E Byers Michael Clements Louise A McKenzie Peter D Steinberg Jeffrey T Wright

Behavioural interactions between ecosystem engineers may strongly influence community structure. We tested whether an invasive ecosystem engineer, the alga Caulerpa taxifolia, indirectly facilitated community diversity by modifying the behaviour of a native ecosystem engineer, the clam Anadara trapezia, in southeastern Australia. In this study, clams in Caulerpa-invaded sediments partially unbu...

Journal: :Ecology 2014
Julian Resasco Nick M Haddad John L Orrock DeWayne Shoemaker Lars A Brudvig Ellen I Damschen Joshua J Tewksbury Douglas J Levey

Landscape corridors are commonly used to mitigate negative effects of habitat fragmentation, but concerns persist that they may facilitate the spread of invasive species. In a replicated landscape experiment of open habitat, we measured effects of corridors on the invasive fire ant, Solenopsis invicta, and native ants. Fire ants have two social forms: polygyne, which tend to disperse poorly but...

Journal: :Proceedings. Biological sciences 2006
Jonathan Silvertown Kevin McConway David Gowing Mike Dodd Michael F Fay Jeffrey A Joseph Konrad Dolphin

A significant proportion of the global diversity of flowering plants has evolved in recent geological time, probably through adaptive radiation into new niches. However, rapid evolution is at odds with recent research which has suggested that plant ecological traits, including the beta- (or habitat) niche, evolve only slowly. We have quantified traits that determine within-habitat alpha diversi...

2016
Christian Wurzbacher Norman Warthmann Elizabeth Bourne Katrin Attermeyer Martin Allgaier Jeff R. Powell Harald Detering Susan Mbedi Hans-Peter Grossart Michael T. Monaghan

Freshwater fungi are a poorly studied paraphyletic group that include a high diversity of phyla. Most studies of aquatic fungal diversity have focussed on single habitats, thus the linkage between habitat heterogeneity and fungal diversity remains largely unexplored. We took 216 samples from 54 locations representing eight different habitats in meso-oligotrophic, temperate Lake Stechlin in nort...

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