The distribution of positive and negative species interactions across environmental gradients on a dual-lattice model

Travis, Justin M. J.; Brooker, Rob W.; Clark, Ewen J.; Dytham, Calvin

doi:10.1016/j.jtbi.2006.01.025

Cited by 90 publications

(88 citation statements)

References 26 publications

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“…Within the study region, a previous study indicates that climate warming benefits the population growth of many rodent species (Jiang et al 2011), and especially favors rare species (Jiang et al 2013). Travis et al (2006) suggested that positive interactions may be found where there is high abiotic stress. There is a need to explore the underlying mechanisms of the observed positive interactions.…”

Section: Effects Of Inter-and Intraspecific Interactionmentioning

confidence: 91%

Intra- and interspecific interactions and environmental factors determine spatial–temporal species assemblages of rodents in arid grasslands

Jiang

et al. 2014

Landscape Ecol

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Many factors have been shown to affect species assemblages of a community, but studies using long-term spatial-temporal community data are still lacking. In this study, by using population abundance data of 14 rodent species over 25 years in 21 sampling sites, we investigated the effects of taxonomic relation, density dependency, species interaction and climate variation in determining spatial-temporal species assemblages of rodents in arid grasslands of Inner Mongolia in China. By the use of GAMM analysis, we found that intraspecific interactions were more common and more significant than interspecific interactions. Negative interactions between species of the same genus were more common than negative interactions between species of different genera. Dominant species show negative interactions on less abundant or rare species. Positive interactions often occur within rare or less abundant species. Through cluster analysis, we found species assemblages of rodent communities are well explained by assemblages of environmental variables, and species of same genus tend not to occur together as compared to species of the same family. Our results indicate that resource partitioning through intra-or interspecific competition and environmental filtering by climate and vegetation are important forces in shaping the spatial-temporal community structure and the dynamics of small mammal populations in an arid grassland landscape.

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Section: Effects Of Inter-and Intraspecific Interactionmentioning

confidence: 91%

Intra- and interspecific interactions and environmental factors determine spatial–temporal species assemblages of rodents in arid grasslands

Jiang

et al. 2014

Landscape Ecol

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“…In general, the role of facilitation increases with abiotic stress whereas competition decreases (Callaway et al, 2002;Cheng et al, 2006;Choler, Michalet, & Callaway, 2001;Liancourt, Callaway, & Michalet, 2005). However, this relationship is not always linear and is currently being vigorously debated (Maestre, Valladares, & Reynolds, 2006;Michalet et al, 2006;Travis, Brooker, Clark, & Dytham, 2006). Besides abiotic factors, biotic disturbances such as grazing also influence plant interactions.…”

Section: Introductionmentioning

confidence: 99%

Does the strength of facilitation by nurse shrubs depend on grazing resistance of tree saplings?

Vandenberghe

Smit

Pohl

et al. 2009

Basic and Applied Ecology

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Facilitation of tree regeneration by nurse shrubs that offer protection against large herbivores is an important driver of wood-pasture dynamics. Here we asked whether the response to facilitation by nurse shrubs depends on the grazing resistance of the prote´ge´saplings. We experimentally tested the protective effects of the thorny Rosa rubiginosa on browsing frequency, survival, and biomass change of saplings of two species-groups, presumably differing in grazing resistance: the coniferous Abies alba and Picea abies and the deciduous Acer pseudoplatanus and Fagus sylvatica saplings. The saplings were planted under and outside (1.5 m) planted nurse shrubs, under zero, low and high grazing intensity. In total, 1920 young saplings were transplanted to 60 blocks and followed for 1 year.Although the number of saplings browsed did not differ between species-groups, the coniferous saplings showed lower resistance to cattle browsing (i.e. lower survival and growth rates) than the deciduous saplings. The less resistant coniferous saplings benefited significantly more from nurse shrubs than the more resistant deciduous species in terms of growth of the surviving saplings, but not in terms of overall survival. This was likely due to herbivory on the nurse shrubs causing incidental browsing on prote´ge´saplings and differences in biomass off-take. At high grazing intensity facilitative effects of the nurse shrubs decreased, especially for the coniferous species.These results have important management implications for the endangered wood-pastures in Western Europe. For a sustainable management and conservation that allows tree recruitment, grazing intensity should remain low to best promote facilitation processes for all tree species, but in particular for the less resistant conifer saplings. die Fo¨rderung durch Ammengebu¨sch von der Beweidungsresistenz der geschu¨tzten Scho¨sslinge abha¨ngt. Wir untersuchten den schu¨tzenden Effekt der dornigen Rosa rubiginosa auf die Beweidungsfrequenz, die Ü berlebensrate und die Vera¨nderungen in der Biomasse fu¨r Scho¨sslinge aus zwei Artengruppen experimentell, von denen wir annehmen, dass sie sich in der Beweidungsresistenz unterscheiden: die Nadelba¨ume Abies alba und Picea abies und die Laubba¨ume Acer pseudoplatanus und Fagus sylvatica. Die Scho¨sslinge wurden unter die und außerhalb (1,5 m) der gepflanzten Ammengebu¨sche bei fehlender Beweidung, geringer und hoher Beweidungsintensita¨t gepflanzt. Insgesamt wurden 1920 junge Scho¨sslinge in 60 Blo¨cken verpflanzt und u¨ber ein Jahr beobachtet. Obwohl sich die Anzahl der beweideten Scho¨sslinge nicht zwischen den Artengruppen unterschied, zeigten die Nadelbaumscho¨sslinge eine geringere Resistenz gegenu¨ber der Rinderbeweidung (d. h. geringere Ü berlebens-und Wachstumsraten) als die Laubbaumscho¨sslinge. Die weniger resistenten Nadelbaumscho¨sslinge profitierten signifikant mehr von den Ammengebu¨schen als die resistenteren Laubbaumscho¨sslinge in Bezug auf das Wachstum der u¨berlebenden Scho¨sslinge, aber nicht in Bezug ...

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“…For example, a frequently applied approach to explore the limits and shapes of species' ranges is to simulate populations across an environmental gradient (given by gradients in one or more vital rates, see, for example, Case et al, 2005;Roy et al, 2008). This general method has been extended to consider species assemblages along environmental gradients (Travis et al, 2006) or under environmental change . Recently, a similar method has been used in a population genetic model (McInerny et al, 2009), and the results indicated that lineages derived from the leading edge of an expanding population are increased, whereas those at a trailing edge are reduced.…”

Section: Discussionmentioning

confidence: 99%

Density-regulated population dynamics and conditional dispersal alter the fate of mutations occurring at the front of an expanding population

et al. 2010

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There is an increasing recognition that the interplay between ecological and evolutionary processes shapes the genetic footprint of populations during and after range expansions. However, more complex ecological processes regularly considered within spatial ecology remain unexplored in models describing the population genetics of range expansion. In this study we integrate flexible descriptions of population growth and competition as well as conditional dispersal into a model that simulates the fate of mutations occurring at the wave front of an expanding population. Our results show that the survival and distribution of a mutation is not only affected by its bias (that is, whether it is deleterious, neutral or beneficial) but also by the mode of local density regulation and conditional dispersal of the simulated populations. It is in particular the chance of a mutation to establish at the front of advance and 'surf' to high frequencies that critically depends on the investigated ecological processes. This is because of the influence of these processes on demographic stochasticity in the system and the differential responses of deleterious, neutral and beneficial mutations to this stochasticity. Generally, deleterious mutations rely more on chance and thus profit the most from ecological processes that enhance demographic stochasticity during the period of establishment. Our study emphasizes the importance of incorporating more ecological realism into evolutionary models to better understand the consequences of shifting geographic ranges for the genetic structure of populations and to find efficient adaptation strategies to mitigate these effects.

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The distribution of positive and negative species interactions across environmental gradients on a dual-lattice model

Cited by 90 publications

References 26 publications

Intra- and interspecific interactions and environmental factors determine spatial–temporal species assemblages of rodents in arid grasslands

Intra- and interspecific interactions and environmental factors determine spatial–temporal species assemblages of rodents in arid grasslands

Does the strength of facilitation by nurse shrubs depend on grazing resistance of tree saplings?

Density-regulated population dynamics and conditional dispersal alter the fate of mutations occurring at the front of an expanding population

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