The contribution of environmental and dispersal filters on phylogenetic and taxonomic beta diversity patterns in Amazonian tree communities

Andino, Juan Ernesto Guevara; Pitman, Nigel C. A.; Steege, Hans ter; Peralvo, Manuel; Cerón, Carlos; Fine, Paul V. A.

doi:10.1007/s00442-021-04981-0

Cited by 9 publications

(10 citation statements)

References 83 publications

(163 reference statements)

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“…The analysis of influencing factors has revealed that both environmental and geographical limitations significantly constrained the maintenance of beta diversity in plant communities in the Nujiang dry and hot valley. We observed that the impact of environmental limitations was notably higher, being 4-6 times greater than that of dispersal limitations, with climate and soil factors playing a critical role in environmental limitations (Andino et al, 2021). In contrast to the findings observed in the Dulongjiang and Yuanjiang valleys of Southwest China, the results indicated that geographic distance played a relatively minor role at the local scale in the Nujiang dry and hot valley (Li et al, 2016;Meng et al, 2017).…”

Section: Discussioncontrasting

confidence: 90%

“…Such differences in the beta composition patterns of different life forms may contribute to variations in plant community composition. The analysis has shown that climate factors are stronger predictive factors at wider spatial scales (50 km 2 ), whereas soil and topographic factors become relatively more important at medium (5 km 2 ) and finer (0.5 km 2 ) scales (Andino et al, 2021). Soil factors, in particular, were identified as important limiting factors in this study.…”

Section: Discussionmentioning

confidence: 58%

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Partitioning beta diversity of dry and hot valley vegetation in the Nujiang River in Southwest China

Zhao

et al. 2023

Front. Ecol. Evol.

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The formation and continued maintenance of beta diversity are essential factors contributing to the effective conservation of plant community biodiversity and sustainable development of ecosystem functions. While it is widely acknowledged that two different patterns, including turnover and nestedness, strongly influence plant community beta diversity, their relative importance in the unique dry and hot valleys of Southwest China is yet to be fully understood. For this study, we established a 100 km belt transect in the Nujiang dry and hot valley of Southwest China and conducted community investigations. The calculations of species and phylogenetic beta diversity composition patterns allowed us to explore the relative importance of environmental and dispersal limitations in terms of their contributions to beta diversity. The findings indicated that in the Nujiang dry and hot valley of Northwest Yunnan, species and phylogenetic beta diversity in the plant communities were mainly composed of the turnover component. The values of phylogenetic beta diversity and its turnover components were lower than those of species beta diversity. Both environmental and dispersal limitations played a role in partitioning beta diversity in the region, with environmental limitations being more dominant than dispersal limitations. The analysis of specific environmental factors revealed that climate factors, such as mean annual precipitation and Hargreaves reference evaporation, and soil factors, such as pH, were the primary drivers of species and phylogenetic beta diversity in the region. In addition, we observed that various limiting environmental factors related to the growth and development of different life forms existed within the dry and hot valley communities. The study highlighted the potential benefits of establishing conservation reserves featuring multiple dominant shrub species in the Nujiang dry and hot valley of Southwest China for the protection of the vegetation. The findings demonstrated that environmental factors, particularly hydrothermal conditions, played a significant role in constraining the maintenance of beta diversity in plant communities in the dry and hot valley region at a regional scale, given the geological history and environmental changes that have occurred over time.

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Section: Discussioncontrasting

confidence: 90%

Section: Discussionmentioning

confidence: 58%

Partitioning beta diversity of dry and hot valley vegetation in the Nujiang River in Southwest China

Zhao

et al. 2023

Front. Ecol. Evol.

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“…Phylogenetic diversity peaks at intermediate precipitation in lowland South American forests and savannas (Neves et al 2020), with semideciduous forests containing specialised lineages from both extremes, whilst the phylogenetic beta‐diversity of Colombian plant assemblages increases with temperature but remains unaffected by differences in precipitation (González‐Caro et al 2014). Climate is a strong predictor of both taxonomic and phylogenetic turnover of tree species in Amazonia, but overall phylogenetic turnover is low (Andino et al 2021). Patterns of phylogenetic alpha‐ and beta‐diversity over environmental gradients remain largely unstudied in savannas.…”

Section: Introductionmentioning

confidence: 99%

Precipitation gradients drive high tree species turnover in the woodlands of eastern and southern Africa

Davies,

Ryan,

Harrison

et al. 2023

Ecography

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Savannas cover one‐fifth of the Earth's surface, harbour substantial biodiversity, and provide a broad range of ecosystem services to hundreds of millions of people. The community composition of trees in tropical moist forests varies with climate, but whether the same processes structure communities in disturbance‐driven savannas remains relatively unknown. We investigate how biodiversity is structured over large environmental and disturbance gradients in woodlands of eastern and southern Africa. We use tree inventory data from the Socio‐Ecological Observatory for Studying African Woodlands (SEOSAW) network, covering 755 ha in a total of 6780 plots across nine countries of eastern and southern Africa, to investigate how alpha, beta, and phylogenetic diversity varies across environmental and disturbance gradients. We find strong climate‐richness patterns, with precipitation playing a primary role in determining patterns of tree richness and high turnover across these savannas. Savannas with greater rainfall contain more tree species, suggesting that low water availability places distributional limits on species, creating the observed climate‐richness patterns. Both fire and herbivory have minimal effects on tree diversity, despite their role in determining savanna distribution and structure. High turnover of tree species, genera, and families is similar to turnover in seasonally dry tropical forests of the Americas, suggesting this is a feature of semiarid tree floras. The greater richness and phylogenetic diversity of wetter plots shows that broad‐scale ecological patterns apply to disturbance‐driven savanna systems. High taxonomic turnover suggests that savannas from across the regional rainfall gradient should be protected if we are to maximise the conservation of unique tree communities.

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“…The role of soil variation in determining floristic composition has been also broadly recognized, particularly at intermediate and landscape scales (Phillips et al, 2003a;Tuomisto et al, 2003b;Guevara Andino et al, 2021). In the hitherto most exhaustive review of the effects of soil factors on floristic composition in tropical forests, Sollins (1998) indicated that the most important edaphic variables that affect evergreen lowlands forests were, in a decreasing order of importance: phosphorus availability, aluminum content, moisture (in terms of drainage and water-holding capacity) and availability of base-metal cations (potassium, calcium, and magnesium).…”

Section: Introductionmentioning

confidence: 99%

Soil and Climate Drive Floristic Composition in Tropical Forests: A Literature Review

et al. 2022

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A vast literature indicates that environment plays a paramount role in determining floristic composition in tropical forests. However, it remains unclear which are the most important environmental factors and their relative effect across different spatial scales, plant life forms or forest types. This study reviews the state of knowledge on the effect of soil and climate on floristic composition in tropical forests. From 137 publications, we collated information regarding: (1) spatial scale, continent, country, life form, and forest type; (2) proportion of variance in floristic composition explained by soil and climatic variables and how it varies across spatial scales; and (3) which soil and climate variables had a significant relationship on community composition for each life form and forest type. Most studies were conducted at landscape spatial scales (67%) and mainly in South America (74%), particularly in Brazil (40%). Studies majorly focused on trees (82%) and on lowland evergreen tropical forests (74%). Both soil and climate variables explained in average the same amount (14% each) of the variation observed in plant species composition, although soils appear to exert a stronger influence at smaller spatial scales while climate effect increases toward larger ones. Temperature, precipitation, seasonality, soil moisture, soil texture, aluminum, and base cations—calcium and magnesium–and their related variables (e.g., cation exchange capacity, or base saturation) were frequently reported as important variables in structuring plant communities. Yet there was variability when comparing different life forms or forest types, which renders clues about certain ecological peculiarities. We recommend the use of standardized protocols for collecting environmental and floristic information in as much as possible, and to fill knowledge gaps in certain geographic regions. These actions will be especially beneficial to share uniform data between researchers, conduct analysis at large spatial scales and get a better understanding of the link between soils and climate gradients and plant strategies, which is key to propose better conservation policies under the light of global change.

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The contribution of environmental and dispersal filters on phylogenetic and taxonomic beta diversity patterns in Amazonian tree communities

Cited by 9 publications

References 83 publications

Partitioning beta diversity of dry and hot valley vegetation in the Nujiang River in Southwest China

Partitioning beta diversity of dry and hot valley vegetation in the Nujiang River in Southwest China

Precipitation gradients drive high tree species turnover in the woodlands of eastern and southern Africa

Soil and Climate Drive Floristic Composition in Tropical Forests: A Literature Review

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