scholarly journals Maladaptation beyond a geographic range limit driven by antagonistic and mutualistic biotic interactions across an abiotic gradient

Evolution ◽  
2019 ◽  
Vol 73 (10) ◽  
pp. 2044-2059 ◽  
Author(s):  
John W. Benning ◽  
David A. Moeller
Keyword(s):  
Biotic Interactions ◽  
Geographic Range ◽  
Range Limit

Biotic Interactions Contribute to the Geographic Range Limit of an Annual Plant: Herbivory and Phenology Mediate Fitness beyond a Range Margin

2019 ◽  
Vol 193 (6) ◽  
pp. 786-797 ◽  
Author(s):  
John W. Benning ◽  
Vincent M. Eckhart ◽  
Monica A. Geber ◽  
David A. Moeller
Keyword(s):  
Biotic Interactions ◽  
Geographic Range ◽  
Annual Plant ◽  
Range Limit ◽  
Range Margin

scholarly journals New record of the fringed leaf frog, Cruziohyla craspedopus (Anura: Phyllomedusidae) extends its eastern range limit

2019 ◽  
Vol 49 (3) ◽  
pp. 208-212 ◽  
Author(s):  
Rafael de FRAGA ◽  
Kelly TORRALVO
Keyword(s):  
Brazilian Amazon ◽  
Geographic Range ◽  
Morphological Data ◽  
Tree Cover ◽  
Range Limit ◽  
Species Occurrence ◽  
Occasional Occurrence ◽  
Points Of View ◽  
Arboreal Habit ◽  
Occurrence Records

ABSTRACT The fringed leaf frog, Cruziohyla craspedopus is rarely sampled in the Brazilian Amazon, probably due to low detection probability associated with its arboreal habit. The knowledge about the species’ distribution stems from successive additions of occasional occurrence records, which indicate that the species is widely distributed throughout Amazonia. We present new occurrence records to update the geographic range of the species, which is hereby extended 224 km to the northeast. We also present morphological data from collected specimens and discuss the updated range from the geographic and ecological points of view. We show that the range of the leaf frog crosses several main tributaries along the southern bank of the Amazonas River, although the species occurrence is apparently limited by a minimum tree cover of 70%.

A genetically based ecological trade‐off contributes to setting a geographic range limit

2021 ◽  
Author(s):  
Alexander A. Mauro ◽  
Julián Torres‐Dowdall ◽  
Craig A. Marshall ◽  
Cameron K. Ghalambor
Keyword(s):  
Geographic Range ◽  
Range Limit ◽  
Trade Off

scholarly journals Barriers to coexistence limit the poleward range of a globally-distributed plant

2020 ◽  
Author(s):  
David W. Armitage ◽  
Stuart E. Jones
Keyword(s):  
Species Interactions ◽  
Thermal Response ◽  
Biotic Interactions ◽  
Predictive Ability ◽  
Range Limit ◽  
Ecological Niche Models ◽  
Limit Theory ◽  
Coexistence Theory ◽  
Species Tolerance ◽  
Niche Models

AbstractSpecies’ poleward ranges are thought to be primarily limited by climatic constraints rather than biotic interactions such as competition. However, theory suggests that a species’ tolerance to competition is reduced in harsh environments, such as at the extremes of its climatic niche. This implies that under certain conditions, interspecific competition near species’ range margins can prevent the establishment of populations into otherwise tolerable environments and results in geographic distributions being shaped by the interaction of climate and competition. We test this prediction by challenging an experimentally-parameterized mechanistic competition model to predict the poleward range boundaries of two widely co-occurring and ecologically-similar aquatic duckweed plants. We show that simple, mechanistic ecological niche models which include competition and thermal response terms best predict the northern range limits of our study species, outperforming competition-free mechanistic models and matching the predictive ability of popular statistical niche models fit to occurrence records. Next, using the theoretical framework of modern coexistence theory, we show that relative nonlinearity in competitors’ responses to temperature fluctuations maintains coexistence at the subordinate competitor’s poleward range boundary, highlighting the importance of this underappreciated fluctuation-dependent coexistence mechanism. Our results demonstrate the predictive utility of mechanistic niche models and support a more nuanced, interactive role of climate and species interactions in determining range boundaries, which may help explain the conflicting results from previous tests of classic range limit theory and contribute to a more mechanistic understanding of range dynamics under global change.

LARVAL TOLERANCE, GENE FLOW, AND THE NORTHERN GEOGRAPHIC RANGE LIMIT OF FIDDLER CRABS

Ecology ◽  
2006 ◽  
Vol 87 (11) ◽  
pp. 2882-2894 ◽  
Author(s):  
Eric Sanford ◽  
Samuel B. Holzman ◽  
Robert A. Haney ◽  
David M. Rand ◽  
Mark D. Bertness
Keyword(s):  
Gene Flow ◽  
Geographic Range ◽  
Range Limit ◽  
Fiddler Crabs ◽  
Tolerance Gene

scholarly journals Biotic interactions limit the geographic range of an annual plant: herbivory and phenology mediate fitness beyond a range margin

2018 ◽  
Author(s):  
John W. Benning ◽  
Vincent M. Eckhart ◽  
Monica A. Geber ◽  
David A. Moeller
Keyword(s):  
Field Experiments ◽  
Environmental Gradients ◽  
Biotic Interactions ◽  
Species Distributions ◽  
Geographic Range ◽  
Range Limits ◽  
Annual Plant ◽  
Lifetime Fitness ◽  
Steep Gradient ◽  
Clarkia Xantiana

AbstractSpecies’ range limits offer powerful opportunities to study environmental factors regulating distributions and probe the limits of adaptation. However, we rarely know what aspects of the environment are actually constraining range expansion, much less which traits are mediating the organisms’ response to these environmental gradients. Though most studies focus on climatic limits to species’ distributions, biotic interactions may be just as important. We used field experiments and simulations to estimate contributions of mammal herbivory to a range boundary in the annual plant Clarkia xantiana ssp. xantiana. A steep gradient of increasing probability of herbivory occurs across the boundary, and herbivory drives several-fold declines in lifetime fitness at and beyond the boundary. By including in our analyses data from a sister taxon with more rapid phenology, we show that delayed phenology drives C. xantiana ssp. xantiana’s susceptibility to herbivory and low fitness beyond its border.

scholarly journals Geographic range limits: achieving synthesis

2009 ◽  
Vol 276 (1661) ◽  
pp. 1395-1406 ◽  
Author(s):  
Kevin J Gaston
Keyword(s):  
Environmental Gradients ◽  
Empirical Studies ◽  
Biotic Interactions ◽  
Geographic Range ◽  
Range Limits ◽  
Demographic Parameter ◽  
Single Population ◽  
Theoretical Evidence ◽  
Population Equation ◽  
Broad Overview

Understanding of the determinants of species' geographic range limits remains poorly integrated. In part, this is because of the diversity of perspectives on the issue, and because empirical studies have lagged substantially behind developments in theory. Here, I provide a broad overview, drawing together many of the disparate threads, considering, in turn, how influences on the terms of a simple single-population equation can determine range limits. There is theoretical and empirical evidence for systematic changes towards range limits under some circumstances in each of the demographic parameters. However, under other circumstances, no such changes may take place in particular parameters, or they may occur in a different direction, with limitation still occurring. This suggests that (i) little about range limitation can categorically be inferred from many empirical studies, which document change in only one demographic parameter, (ii) there is a need for studies that document variation in all of the parameters, and (iii) in agreement with theoretical evidence that range limits can be formed in the presence or absence of hard boundaries, environmental gradients or biotic interactions, there may be few general patterns as to the determinants of these limits, with most claimed generalities at least having many exceptions.

Reduced pollinator service and elevated pollen limitation at the geographic range limit of an annual plant

Ecology ◽  
2012 ◽  
Vol 93 (5) ◽  
pp. 1036-1048 ◽  
Author(s):  
David A. Moeller ◽  
Monica A. Geber ◽  
Vincent M. Eckhart ◽  
Peter Tiffin
Keyword(s):  
Pollen Limitation ◽  
Geographic Range ◽  
Annual Plant ◽  
Range Limit ◽  
Pollinator Service
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