Fine-scale species co-occurrence patterns in an old-growth temperate forest

Zhang, Jian; Hao, Zhanqing; Song, Bo; Li, Buhang; Wang, Xugao; Ye, Ji

doi:10.1016/j.foreco.2009.02.016

Cited by 32 publications

(26 citation statements)

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“…Li et al [45] found that self-thinning may influence species' spatial distribution patterns at the scale of 0–10 m. Zhang et al [46] found evidence of strong interspecific competition at a fine scale (10 m) in temperate forest. We also infer the biotic interactions exert an important influence on fine-scale species distribution patterns in DHS plot.…”

Section: Discussionmentioning

confidence: 99%

Separating the Effects of Environment and Space on Tree Species Distribution: From Population to Community

et al. 2013

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Quantifying the relative contributions of environmental conditions and spatial factors to species distribution can help improve our understanding of the processes that drive diversity patterns. In this study, based on tree inventory, topography and soil data from a 20-ha stem-mapped permanent forest plot in Guangdong Province, China, we evaluated the influence of different ecological processes at different spatial scales using canonical redundancy analysis (RDA) at the community level and multiple linear regression at the species level. At the community level, the proportion of explained variation in species distribution increased with grid-cell sizes, primarily due to a monotonic increase in the explanatory power of environmental variables. At the species level, neither environmental nor spatial factors were important determinants of overstory species' distributions at small cell sizes. However, purely spatial variables explained most of the variation in the distributions of understory species at fine and intermediate cell sizes. Midstory species showed patterns that were intermediate between those of overstory and understory species. At the 20-m cell size, the influence of spatial factors was stronger for more dispersal-limited species, suggesting that much of the spatial structuring in this community can be explained by dispersal limitation. Comparing environmental factors, soil variables had higher explanatory power than did topography for species distribution. However, both topographic and edaphic variables were highly spatial structured. Our results suggested that dispersal limitation has an important influence on fine-intermediate scale (from several to tens of meters) species distribution, while environmental variability facilitates species distribution at intermediate (from ten to tens of meters) and broad (from tens to hundreds of meters) scales.

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Section: Discussionmentioning

confidence: 99%

Separating the Effects of Environment and Space on Tree Species Distribution: From Population to Community

et al. 2013

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“…An observed c-score that is significantly greater than the mean c-score of the null distributions suggests competition (Gotelli 2000, Veech 2006). We calculated the standard effect size (SES) as (observed c-score -mean of simulated c-scores)/standard deviation of simulated c-score (Gurevitch et al 1992, Zhang et al, 2009), An SES >2,0 suggests species segregation, whereas an SES of less than -2.0 suggests aggregation. Because habitat heterogeneity may bias results (Gotelli 2000), we analyzed co-occurrence in a subset of survey locations around which >50% of pixels in a 100-m circular buffer were classified as developed at medium or high intensity according to the Alabama Gap Analysis Program land-cover map (Kleiner et al, 2007).…”

Section: Study Area and Bird Surveysmentioning

confidence: 99%

A Multi-Scale Analysis of Competition between the House Finch and House Sparrow in the Southeastern United States

2011

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The decline of House Sparrow (Passer domesticus) populations in eastern North America has been proposed to be a consequence of competition between the House Sparrow and the House Finch (Carpodacus mexicamis), both introduced species. Previous research testing the hypothesis that House Sparrow declines are due to competition with House Finches focused on populations in the northeastern U.S., excluding other regions where the species coexist. We tested for effects of competition between these two species in the southeastern U.S. at two scales of analysis. First, we looked for evidence of competition at a local scale during the breeding season by examining patterns of co-occurrence of House Finches and House Sparrows at count points within a 28.3-km-study area centered on Auburn, Alabama. Second, we tested for the effects of competition at a regional scale across seven southeastern states by analyzing trends in Christmas Bird Count data. Using null-model analysis, we found no evidence for competitive exclusion in our assessment of local co-occurrence, suggesting that if there is competition between these species it is not important enough to affect their spatial distribution during the breeding season. At the regional scale, contrary to findings in the northeastern U.S., the decline of House Sparrow populations within the southeastern U.S. was not significantly correlated with House Finch abundance. Our results suggest that competition with House Finches is not a major cause of decline of the House Sparrow population in the southeastern U.S. Análisis de Competencia en Multiples Escalas entre Carpodacus mexicanus y Passer domesticus en el Sureste de Estados UnidosResumen. Se ha propuesto que la disminución de las poblaciones de Passer domesticus en el este de America del Norte es una consecuencia de la competencia entre P. domesticus y Carpodacus mexicanus, ambas especies introducidas. Investigaciones previas que evaluaron la hipótesis de que la disminución de P. domesticus es debida a la competencia con C. mexicanus se enfocaron en las poblaciones del noreste de EEUU, excluyendo otras regiones donde las especies coexisten. Evaluamos los efectos de la competencia entre estas dos especies en el sudeste de EEUU, considerando dos escalas de análisis. Primero, buscamos evidencia de competencia a escala local durante la estación reproductiva mediante el examen de patrones de co-ocurrencia de C. mexicanus y P. domesticus en puntos de conteo dentro de un área de estudio de 28.3 km-centrada en Auburn, Alabama. Segundo, evaluamos los efectos de la competencia a escala regional a través de siete estados del sudeste mediante el análisis de las tendencias en los datos del Conteo de Aves de Navidad. Usando análisis de modelos nulos, no encontramos evidencia de exclusión competitiva en nuestra evaluación de co-ocurrencia local, sugiriendo que si hay competencia entre estas especies no es de una importancia suficiente como para afectar su distribución espacial durante la estación reproductiva. A escala regional, contrariamente a lo...

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“…Understanding how patterns of species co‐occurrence change across different spatial scales is critical to understanding how ecological processes drive community assembly in general (Zhang et al . , Bowker et al . ).…”

mentioning

confidence: 97%

“…), whereas it is not clear which ecological processes influence species distribution at large spatial scales (Zhang et al . ). Using species co‐occurrence analyses, Maestre et al .…”

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confidence: 99%

Changes in Patterns of Species Co‐occurrence across Two Tropical Cloud Forests Differing in Soil Nutrients and Air Temperature

et al. 2015

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Patterns of co‐occurrence of species are increasingly used to examine the contribution of biotic interactions to community assembly. We assessed patterns of co‐occurrence at four scales, in two types of tropical cloud forests in Hainan Island, China (tropical montane evergreen forests, TMEF and tropical dwarf forests, TDF) that varied significantly in soil nutrients and temperature. We tested if the patterns of co‐occurrence changed when we sorted species into classes by abundance and diameter at breast height (dbh). Co‐occurrence differed by forest type and with plot size, with significant species aggregation observed across larger plots in TDF and patterns of species segregation observed in smaller plots in TMEF. Analyses of differential abundance and dbh classes also showed that smaller plots in TMEF tend to have negative co‐occurrence patterns, but larger plots in TDF tend to show patterns of aggregation, suggesting competitive and facilitative interactions. This underscores the scale‐dependence of the processes contributing to community assembly. Furthermore, it is consistent with predictions of the stress gradient hypothesis that facilitation will be most important in biological systems subject to abiotic stress, while competition will be more important in less abiotically stressful habitats. Our results clearly demonstrate that these two types of tropical cloud forest exhibit different co‐occurrence patterns, and that these patterns are scale‐dependent, though independent of plant abundance and size class.

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Fine-scale species co-occurrence patterns in an old-growth temperate forest

Cited by 32 publications

References 32 publications

Separating the Effects of Environment and Space on Tree Species Distribution: From Population to Community

Separating the Effects of Environment and Space on Tree Species Distribution: From Population to Community

A Multi-Scale Analysis of Competition between the House Finch and House Sparrow in the Southeastern United States

Changes in Patterns of Species Co‐occurrence across Two Tropical Cloud Forests Differing in Soil Nutrients and Air Temperature

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