Diversidad florística arbórea y su relación con el suelo en un bosque pluvial tropical del chocó biogeográfico

Mosquera, Harley Quinto; Hurtado, Flavio Humberto Moreno

doi:10.1590/s0100-67622014000600017

Cited by 15 publications

(5 citation statements)

References 25 publications

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“…Our analyses are similar to those of other studies performed in different regions of tropical forest, which indicated that environments with greater hydro-edaphic restrictions tend to have lower species richness (Jones et al, 2008;J. Silva et al, 2010;Mosquera & Hurtado, 2014). For instance, in an ecotone area between Brazilian Amazonia and 'Cerrado' (savanna), Elias et al (2019) also reported that tree species richness is related to topography, indicating that hydric restrictions function as a filter to species in environments of sandy soils.…”

Section: Effect Of Environmental Variables and Abundance Of P Gracili...supporting

confidence: 88%

Environmental filters and biotic interactions drive species richness and composition in ecotone forests of the northern Brazilian Amazonia

Silva¹,

Pequeno²,

Farias³

et al. 2021

bcnaturais

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The structure of tree communities in tropical forests depends on environmental filters and biotic interactions such as competition and facilitation. Many ecotone forests in Northern Amazonia are intriguingly populated by tree assemblages characterized by distinct abundances of a single species, Peltogyne gracilipes (Leguminosae). It is unclear whether this pattern solely reflects environmental filters or also antagonistic interactions among species with similar habitat requirements. The aim of this study was to determine the response of species richness and composition to environmental filters, and analyze the role of P. gracilipes in structuring tree communities in ecotone forest areas of the Northern Brazilian Amazonia. We sampled 129 permanent plots along a hydro-edaphic gradient. All arboreal individuals with stem diameter ≥10 cm were measured and identified. Multiple regressions were performed to test the effects of environmental filters, and abundance of P. gracilipes on the tree species richness and composition. Species richness and composition responded to the same filters which, in turn, affected species composition directly and indirectly, through the abundance of P. gracilipes. Our results indicate that both abiotic filters and biotic interactions shape the studied tree communities. P. gracilipes can be considered an indicator species of hydro-edaphic conditions, but also is itself a driver of tree community structure.

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Section: Effect Of Environmental Variables and Abundance Of P Gracili...supporting

confidence: 88%

Environmental filters and biotic interactions drive species richness and composition in ecotone forests of the northern Brazilian Amazonia

Silva¹,

Pequeno²,

Farias³

et al. 2021

bcnaturais

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“…In particular, several studies have pointed to the effects of topographic and edaphic variables on variation in tree species distribution within individual NNFEF units. These studies have shown that tree diversity and distribution can be determined by topographic heterogeneity in the Atlantic Forest ; soil fertility gradients in the Amazon (Phillips et al, 2003;ter Steege et al, 2006;Bohlman et al, 2008;Coronado et al, 2009;Higgins et al, 2011;Pansonato et al, 2013); altitude and interaction between wind and topography in the Andean forest (Stadtmüller, 1987;Killeen et al, 2007); geomorphology and soil fertility in the Choco (Gentry, 1986;Faber-Langendoen & Gentry, 1991;Mosquera & Hurtado, 2014;Copete et al, 2019); topographic heterogeneity, geological gradients, and soil texture in Mesoamerica (Pyke et al, 2001;Sesnie et al, 2009;Chain-Guadarrama et al, 2012;Morera-Beita et al, 2019); and geology, soil type and altitudinal variation in the Caribbean (Graham, 2003;Santiago-Valentin & Olmstead, 2004;Maunder et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Environmental variables and dispersal barriers explain broad‐scale variation in tree species composition across Neotropical non‐flooded evergreen forests

Cupertino‐Eisenlohr

Eisenlohr

Barros-Rosa

et al. 2021

J Vegetation Science

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Questions We examined the drivers of tree species variation across Neotropical non‐flooded evergreen forests (NNFEFs) to answer the following questions: can floristic groups be differentiated based on environmental predictors? How do bioclimatic, topographic, edaphic predictors and dispersal barriers contribute to explain the floristic variation throughout NNFEFs? Location Neotropical region. Methods Based on 1,843 sites (circular areas with a diameter of 10 km), 15,072 species and 509,793 occurrence records of trees, as well as on environmental variables (42 bioclimatic, 13 edaphic and four topographic variables) and dispersal barriers (based on ecological and geographical dispersal suitability), we tested whether environmental predictive variables can discriminate NNFEF floristic groups, and built canonical models and variation partitioning to assess which variables contributed most to the floristic variation. Results Despite extensive overlap in predictive variables, Amazon and Atlantic Forest were the most differentiated among the nine NNFEF groups. Floristic variation along NNFEFs was mainly determined by environmental factors (54.1%), with topographic and edaphic variables, mainly topographic wetness index and pH respectively, representing the most important predictors followed by a combination of environmental factors and dispersal barriers (22.7%). The fraction of pure dispersal barriers also contributed significantly to our model (3.7%), especially considering the second canonical axis. Conclusions The high importance of soil and topographic variables indicates that the species have a relatively narrow niche driven by such factors, suggesting that conservation strategies should not be generalized for NNFEFs. In addition, dispersal barriers do not seem to have prevented floristic exchanges between most NNFEF groups, except in the Atlantic Forest.

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“…1) Structure and diversity of vegetation: the high diversity of tree species in the rainforests of the biogeographic Chocó [47,48], which differ in age, size, wood density, nutrient content, light requirements, photosynthesis and growth rates, might lead to variation in the amount of the most limiting nutrients for the production of organic matter [49,11]. In particular, differences in life histories of plants lead to differential nutritional requirements and responses to fertilization [18,50]; also, it is known that small trees respond to fertilization differently than large trees [31,51,49,11].…”

Section: Discussionmentioning

confidence: 99%

Effects of Soil Fertilization on the Allocation of Net Primary Productivity in Tropical Rainforests of Chocó, Colombia

Mosquera¹,

Valois-Cuesta²,

Moreno-Hurtado³

2021

Preprint

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Tropical rainforests have the highest rates of net primary productivity (NPP) of the world. Hypotheses about the effect of edaphic nutrient contents, especially the availability of P, propose that they limit NPP of tropical forests or promote the redistribution of its above and belowground components. However, these hypotheses have not been tested experimentally in highly rainy tropical forests. To test such hypotheses, the effects of soil fertilization on the above and belowground NPP were evaluated in forests of two localities of Chocó (Colombia), one of the rainiest regions of the world. Five fertilization treatments (N, P, K, NPK and Control) were applied, and the above and belowground NPP were determined in permanent plots. There were no significant effects of treatments on total NPP; only the application of N significantly increased litter NPP. Additionally, a redistribution of the above and belowground NPP was found with the application of P, which increased the proportion of fine roots and litter, and decreased the woody components of forest NPP. This change of carbon allocation is interpreted as an ecophysiological mechanism to capture additional nutrients in soils with very low content of available P.

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Diversidad florística arbórea y su relación con el suelo en un bosque pluvial tropical del chocó biogeográfico

Cited by 15 publications

References 25 publications

Environmental filters and biotic interactions drive species richness and composition in ecotone forests of the northern Brazilian Amazonia

Environmental filters and biotic interactions drive species richness and composition in ecotone forests of the northern Brazilian Amazonia

Environmental variables and dispersal barriers explain broad‐scale variation in tree species composition across Neotropical non‐flooded evergreen forests

Effects of Soil Fertilization on the Allocation of Net Primary Productivity in Tropical Rainforests of Chocó, Colombia

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