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You searched for: Journal Ecography Remove constraint Journal: Ecography Publication Year 2012 Remove constraint Publication Year: 2012 Source 2012 v.35 no.11 Remove constraint Source: 2012 v.35 no.11
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1. Biotic interactions affect the elevational ranges of high‐latitude plant species

Author:
Roux, Peter C. le; Virtanen, Risto; Heikkinen, Risto K.; Luoto, Miska
Source:
Ecography 2012 v.35 no.11 pp. 1048-1056
ISSN:
0906-7590
Subject:
Bryopsida; biogeography; latitude; lichens; models; niches; planting; prediction; probability; Finland; Norway
Abstract:
... Ecological theory suggests that positive plant–plant interactions can extend species distributions into areas that would otherwise be unfavourable. However, few studies have tested this hypothesis, and none have explicitly examined the associated prediction that inter‐specific interactions between plants may broaden species altitudinal distributions. Here we test this prediction, using fine‐scale ...
DOI:
10.1111/j.1600-0587.2012.07534.x

2. Ecological drivers of change at South Georgia: the krill surplus, or climate variability

Author:
Trathan, P. N.; Ratcliffe, N.; Masden, E. A.
Source:
Ecography 2012 v.35 no.11 pp. 983-993
ISSN:
0906-7590
Subject:
Arctocephalus; Euphausia superba; breeding season; climate; humans; ice; krill; oceans; pasta; penguins; seabirds; seals; surpluses; surveys; whales; Antarctic region; Georgia
Abstract:
... Macaroni penguins Eudyptes chrysolophus are thought to be one of the most important mesopredators in the Southern Ocean having a greater impact on prey availability and abundance than any other seabird species. Their population centre has long been held to be South Georgia where populations were thought to comprise many million animals. Here we report the results of a recent census of the macaroni ...
DOI:
10.1111/j.1600-0587.2012.07330.x

3. First flowering of wind‐pollinated species with the greatest phenological advances in Europe

Author:
Ziello, Chiara; Böck, Andreas; Estrella, Nicole; Ankerst, Donna; Menzel, Annette
Source:
Ecography 2012 v.35 no.11 pp. 1017-1023
ISSN:
0906-7590
Subject:
risk; human diseases; hay fever; flowering; linear models; pollination; exposure duration; human health; climate change; Angiospermae; pollen; Europe
Abstract:
... Increasing risk of pollinosis (hay fever) is one of the most anticipated consequences of climate change on human health. Wind‐pollinated plants are representative of allergenic species because they include species with the highest capability of causing allergy‐related diseases in humans. Therefore, changes in wind‐pollinated species may reflect impacts of climate change on allergenic plants. In pa ...
DOI:
10.1111/j.1600-0587.2012.07607.x

4. Flexible dispersal strategies in native and non‐native ranges: environmental quality and the ‘good–stay, bad–disperse’ rule

Author:
Hui, Cang; Roura‐Pascual, Núria; Brotons, Lluís; Robinson, Robert A.; Evans, Karl L.
Source:
Ecography 2012 v.35 no.11 pp. 1024-1032
ISSN:
0906-7590
Subject:
Sturnus vulgaris; environmental degradation; environmental factors; environmental quality; models; niches; population dynamics; temporal variation; South Africa; United Kingdom
Abstract:
... Dispersal strategies are one of the most important determinants of range dynamics and a surrogate for invasiveness. We tested three inter‐related hypotheses derived from demographic and ecological models: (H1) short‐distance dispersal strategies arise at native range margins due to their demographic advantage; (H2) in non‐native areas a high diffusion rate is favoured at the advancing range front ...
DOI:
10.1111/j.1600-0587.2012.07697.x

5. Functional responses in the habitat selection of a generalist mega‐herbivore, the African savannah elephant

Author:
Roever, C. L.; van Aarde, R. J.; Leggett, K.
Source:
Ecography 2012 v.35 no.11 pp. 972-982
ISSN:
0906-7590
Subject:
temporal variation; selection response; landscapes; models; trees; Loxodonta africana; people; wet season; habitats; wildlife; prediction
Abstract:
... Resource selection function (RSF) models are commonly used to quantify species/habitat associations and predict species occurrence on the landscape. However, these models are sensitive to changes in resource availability and can result in a functional response to resource abundance, where preferences change as a function of availability. For generalist species, which utilize a wide range of habita ...
DOI:
10.1111/j.1600-0587.2012.07359.x

6. Identification of subpopulations from connectivity matrices

Author:
Jacobi, Martin Nilsson; André, Carl; Döös, Kristofer; Jonsson, Per R.
Source:
Ecography 2012 v.35 no.11 pp. 1004-1016
ISSN:
0906-7590
Subject:
aquatic invertebrates; conservation areas; data collection; founder effect; genotyping; landscapes; larvae; population structure; probability; Baltic Sea
Abstract:
... Dispersal on the landscape/seascape scale may lead to complex spatial population structure with non‐synchronous demography and genetic divergence. In this study we present a novel approach to identify subpopulations and dispersal barriers based on estimates of dispersal probabilities on the landscape scale. A theoretical framework is presented where the landscape connectivity matrix is analyzed fo ...
DOI:
10.1111/j.1600-0587.2012.07281.x

7. Modelling niche and neutral dynamics: on the ecological interpretation of variation partitioning results

Author:
Tuomisto, Hanna; Ruokolainen, Lasse; Ruokolainen, Kalle
Source:
Ecography 2012 v.35 no.11 pp. 961-971
ISSN:
0906-7590
Subject:
autocorrelation; community structure; environmental factors; models; niches; problem solving; regression analysis; surveys; variance
Abstract:
... Many studies have attempted to disentangle the effects of neutral and niche‐mediated processes on community composition using partial Mantel tests and variance partitioning on dissimilarity matrices. Recently, doubts about the reliability of these methods have emerged. Here we explore how the results are affected by three confounding factors that may affect ecological data to different degrees: sp ...
DOI:
10.1111/j.1600-0587.2012.07339.x

8. Salinity influences the distribution of marine snakes: implications for evolutionary transitions to marine life

Author:
Brischoux, François; Tingley, Reid; Shine, Richard; Lillywhite, Harvey B.
Source:
Ecography 2012 v.35 no.11 pp. 994-1003
ISSN:
0906-7590
Subject:
birds; climate change; correlation; landforms; life events; mammals; salinity; snakes; species diversity; turtles
Abstract:
... Secondary transitions from terrestrial to marine life provide remarkable examples of evolutionary change. Although the maintenance of osmotic balance poses a major challenge to secondarily marine vertebrates, its potential role during evolutionary transitions has not been assessed. In the current study, we investigate the role of oceanic salinity as a proximate physiological challenge for snakes d ...
DOI:
10.1111/j.1600-0587.2012.07717.x

9. The roles of shifting and filtering in generating community‐level flowering phenology

Author:
Craine, Joseph M.; Wolkovich, Elizabeth M.; Towne, E. Gene
Source:
Ecography 2012 v.35 no.11 pp. 1033-1038
ISSN:
0906-7590
Subject:
climate; ecosystems; filters; flora; flowering; flowers; global warming; growing season; niches; ornamental horticulture; phenology; planting; prairies; spring; England; United States
Abstract:
... Plant phenologies are key components of community assembly and ecosystem function, yet we know little about how phenological patterns differ among ecosystems. Community‐level phenological patterns may be driven by the filtering of species into communities based on their phenology or by intraspecific responses to local conditions that shift when species flower. To understand the relative roles of f ...
DOI:
10.1111/j.1600-0587.2012.07625.x

10. Where on earth can animals use a geomagnetic bi‐coordinate map for navigation?

Author:
Boström, Jannika E.; Åkesson, Susanne; Alerstam, Thomas
Source:
Ecography 2012 v.35 no.11 pp. 1039-1047
ISSN:
0906-7590
Subject:
birds; cans; isogenic lines; longitude
Abstract:
... Many animal taxa have been shown to possess the ability of true navigation. In this study we investigated the possibilities for geomagnetic bi‐coordinate map navigation in different regions of the earth by analysing angular differences between isolines of geomagnetic total intensity and inclination. In ‘no‐grid’ zones where isolines were running almost parallel, efficient geomagnetic bi‐coordinate ...
DOI:
10.1111/j.1600-0587.2012.07507.x