Regions of Interior-Basin Drainage

Martonne, Emmanuel De

doi:10.2307/208323

Cited by 103 publications

(30 citation statements)

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“…Habitat severity can be reflected through habitat productivity (biomass per area and unit time, g·m −2 ·yr −1 ), with the latter shown to be positively related to habitat biomass under stressful conditions (Noy‐Meir ; Weiner ). In order to test whether there is a relationship between habitat biomass and environmental severity in our study, we assessed the relationship of habitat biomass with effective precipitation (EP; de Martonne ) during the growing season (Jun, Jul and Aug) of each site. EP has been used previously as a surrogate for environmental stress (Kikvidze et al.…”

Section: Methodsmentioning

confidence: 99%

Cushion plants can have a positive effect on diversity at high elevations in the Himalayan Hengduan Mountains

Chen

Schöb

Zhou

et al. 2015

J Vegetation Science

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Questions: What is the community-level consequence of biotic processes, in particular the importance of facilitation, in determining patterns of diversity in alpine plant communities of the Himalayan Hengduan Mountains? Does facilitation intensity change with environmental severity, and are these changes due to environmental severity or nurse trait effects?Location: Eleven alpine plant communities dominated by cushion plants in the Himalayan Hengduan Mountains, within the mountain system of south-central China.Methods: We determined plant species richness and abundance in habitats created by cushions and cushion-free areas, and assessed the cushion effects on species richness and abundance with rarefaction curves and the relative interaction index, respectively. We examined the relationship between cushion effects on diversity and habitat severity and tested if changes in the net cushion effects along the severity gradient were due to a change in the performance of species without cushions (environmental severity effect) and/or with cushions (nurse trait-mediated effect). Results:The presence of cushion plants increased species richness and abundance in most studied plant communities. The net facilitation effect of cushions increased with increasing habitat severity, an effect that could be attributed mainly to a reduction in species richness in cushion-free areas with increasing severity. However, the changes in magnitude of facilitation of particular cushion species growing in high and low severity habitats could be attributed to both environmental severity and neighbour trait effects. Despite the overall positive effect of cushion plants on plant species richness, not all cushion species contributed to higher species richness. The deviation of individual cushion species from the general pattern of increasing facilitation with increasing severity indicated the species specificity of facilitation depends on the traits of nurse species. Conclusion: The presence of cushion plants generally increased species richnessin alpine plant communities of the Himalayan Hengduan Mountains, with the importance of the cushion effect increasing with habitat severity due to a buffering effect by cushions of the negative effect of habitat severity on species richness observed in cushion-free areas. This indicates the pivotal role of facilitative interactions among plant species in supporting high diversity in these severe environments.

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Section: Methodsmentioning

confidence: 99%

Cushion plants can have a positive effect on diversity at high elevations in the Himalayan Hengduan Mountains

Chen

Schöb

Zhou

et al. 2015

J Vegetation Science

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“…Finally, we tried combining temperature and precipitation in various ways to quantify ''water-energy'' balance, since an extensive analysis of literature on the latitudinal gradient of biological diversity undertaken by a large group of ecologists (Hawkins et al 2003) and a recent meta-analysis (Field et al 2009) suggest that measures of energy, water, or waterenergy balance explain spatial variation in richness better than other climatic and non-climatic variables. Here, we present two such composite variables: Utilizable Energy (hereafter UE), an index constructed herein, and for comparison, the classic Effective Precipitation (EP) measure (de Martonne 1927).…”

Section: Introductionmentioning

confidence: 99%

Climatic drivers of plant–plant interactions and diversity in alpine communities

et al. 2011

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Alpine plant communities are particularly amenable to experimentally test the stress-gradient hypothesis (SGH), which predicts that competitive interactions will be more frequent in relatively productive environments, whereas facilitation will be more common in severe systems. Experimental testing of the SGH along latitudinal and elevation gradients within and across continents indicated that particular climatic variables act as drivers of plant-plant interactions and community structure. However, the SGH in its current form remains a general framework that does not link explicitly climate variables such as temperature and precipitation to plant interactions or diversity. Here, we re-analyse our published data in order to explore whether climate can regulate biotic interactions and species diversity in alpine communities. We applied PCA to meteorological data, introduced latitude as a variable, and also used specially developed composite variables that combine temperature and precipitation during the growing season. The intensity of competitive interactions at low elevations decreased with increasing latitude, whereas the intensity of facilitative interactions at higher elevations did not vary with latitude. Micro-scale spatial patterns followed the same trend indicating that plant-plant interactions could generate these patterns. These findings specify the role of temperature in shifting the balance of plant interactions and can be readily incorporated in the SGH. We also found that species richness correlated positively with a composite climate variable, which is the product of maximum temperature and precipitation. Inclusion of this finding into the SGH will, however, need further studies focusing on the importance of water-energy relations for the dynamic balance of facilitation and competition.

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“…Abbreviation and type of variables are also indicated (P = precipitation, T = temperature, P/T or T/P = ratio). Aridity index (Ai) [52]:…”

Section: Bioclimatic Variablesmentioning

confidence: 99%

Functional Response Trait Analysis Improves Climate Sensitivity Estimation in Beech Forests at a Trailing Edge

Salamon-Albert

Abaligeti

Ortmann‐Ajkai

2017

Forests

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Functional response traits influence the ability of species to colonize and thrive in a habitat and to persist under environmental challenges. Functional traits can be used to evaluate environment-related processes and phenomena. They also help to interpret distribution patterns, especially under limiting ecological conditions. In this study, we investigate landscape-scale functional distribution responses of beech forests in a climatic transitional zone in Europe. We construct empirical density distribution responses for beech forests by applying coping-resilience-failure climatic traits based on 27 bioclimatic variables, resulting in prevalence-decay-exclusion distribution response patterns. We also perform multivariate exploratory cluster analysis to reveal significant sets of response patterns from the resilience and adaptation aspects. Temperature-related distribution responses presented a prevalence-dominated functional pattern, with Annual mean temperature indicating the most favorable adaptation function. Precipitation indices showed climate-limited response patterns with the dominance of extinction function. Considering regional site-specific climate change projections, these continental beech forests could regress moderately due to temperature increase in the near future. Our results also suggest that both summer and winter precipitation could play a pivotal role in successful resilience. Functions and variables that indicate climate sensitivity can serve as a useful starting point to develop adaptation measures for regional forest management.

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Regions of Interior-Basin Drainage

Cited by 103 publications

References 0 publications

Cushion plants can have a positive effect on diversity at high elevations in the Himalayan Hengduan Mountains

Cushion plants can have a positive effect on diversity at high elevations in the Himalayan Hengduan Mountains

Climatic drivers of plant–plant interactions and diversity in alpine communities

Functional Response Trait Analysis Improves Climate Sensitivity Estimation in Beech Forests at a Trailing Edge

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