Impact of rain forest fragmentation on the population size of a structurally important palm species: Astrocaryum mexicanum at Los Tuxtlas, Mexico

Arroyo‐Rodríguez, Víctor; Aguirre, Armando; Benítez‐Malvido, Julieta; Mandujano, Salvador

doi:10.1016/j.biocon.2007.04.016

Cited by 53 publications

(56 citation statements)

References 44 publications

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“…This assumption is limited by the fact that we did not identify the palm species in this study. However, in accordance to our results, other studies found smaller abundance of some palm species in more degraded forests (Arroyo-Rodríguez et al, 2007a;Baez and Balslev, 2007). Forest structure may also influence the occurrence and abundance of seed dispersers (Balcomb et al, 2000;Arroyo-Rodríguez et al, 2007b).…”

Section: Discussionsupporting

confidence: 81%

Effects of climate and forest structure on palms, bromeliads and bamboos in Atlantic Forest fragments of Northeastern Brazil

Hilário

Toledo

2016

Braz. J. Biol.

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Palms, bromeliads and bamboos are key elements of tropical forests and understanding the effects of climate, anthropogenic pressure and forest structure on these groups is crucial to forecast structural changes in tropical forests. Therefore, we investigated the effects of these factors on the abundance of these groups in 22 Atlantic forest fragments of Northeastern Brazil. Abundance of bromeliads and bamboos were assessed through indexes. Palms were counted within a radius of 20 m. We also obtained measures of vegetation structure, fragment size, annual precipitation, precipitation seasonality and human population density. We tested the effects of these predictors on plant groups using path analysis. Palm abundance was higher in taller forests with larger trees, closed canopy and sparse understory, which may be a result of the presence of seed dispersers and specific attributes of local palm species. Bromeliads were negatively affected by both annual precipitation and precipitation seasonality, what may reflect adaptations of these plants to use water efficiently, but also the need to capture water in a regular basis. Bamboos were not related to any predictor variable. As climate and forest structure affected the abundance of bromeliads and palms, human-induced climatic changes and disturbances in forest structure may modify the abundance of these groups. In addition, soil properties and direct measurements of human disturbance should be used in future studies in order to improve the predictability of models about plant groups in Northeastern Atlantic Forest.Keywords: Arecaceae, Bambusoideae, Bromeliaceae, disturbance, rainfall, secondary forest fragments. Efeitos do clima e da estrutura da vegetação em palmeiras, bromélias e bambus em fragmentos de Mata Atlântica no nordeste brasileiro ResumoPalmeiras, bromélias e bambus são importantes elementos das florestas tropicais e, entender os efeitos do clima, pressão antrópica e estrutura da floresta nesses grupos é crucial para prever alterações estruturais em florestas tropicais. Portanto, nós investigamos os efeitos desses fatores na abundância desses grupos vegetais em 22 fragmentos de Mata Atlântica no nordeste brasileiro. Abundâncias de bromélias e bambus foram registradas através de índices. Palmeiras foram contadas em um raio de 20 m. Nós também obtemos medidas da estrutura da vegetação, tamanho de fragmento, precipitação anual, sazonalidade na precipitação e densidade populacional humana. Nós testamos os efeitos desses preditores nos grupos vegetais através de análises de caminhos. A abundância de palmeiras foi maior em florestas mais altas, com árvores mais grossas, dossel fechado e sub-bosque aberto, o que deve refletir a presença de dispersores de sementes e atributos específicos das espécies de palmeiras locais. Bromélias foram negativamente afetadas pela precipitação anual e pela sazonalidade na precipitação, o que deve refletir adaptações dessas plantas para o uso eficiente da água, mas também a necessidade de captar água regularmente. Bambus n...

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Section: Discussionsupporting

confidence: 81%

Effects of climate and forest structure on palms, bromeliads and bamboos in Atlantic Forest fragments of Northeastern Brazil

Hilário

Toledo

2016

Braz. J. Biol.

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“…Tropical American palms are diverse, with 459 species in 50 genera recorded in South America (Pintaud et al, 2008b), and at least 150 species in 25 genera in Central America (Henderson et al, 1995). Tropical American palms are also commonly gregarious and locally abundant (Terborgh & Andresen, 1998;Arroyo-Rodriguez et al, 2007), forming up to 72% of the canopy cover locally (Kahn & de Granville, 1992). This is particularly noteworthy in tropical forests where the high tree diversity generally results in a low density of each treelike species (Lieberman & Lieberman, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…From a socio-economic standpoint, tropical American palms are considered a major resource (Henderson et al, 1995) as fruits, leaves, stems, seeds, sap and other parts are exploited, destructively or not, for numerous purposes (Macía, 2004;Balslev et al 2008;Galeano & Bernal, 2010). Human-induced disturbances that may cause the loss of such species should have dramatic consequences for the ecological functioning of tropical American ecosystems (Arroyo-Rodriguez et al, 2007) and for the crucial services these species provide.…”

Section: Introductionmentioning

confidence: 99%

Disturbance and Resilience in Tropical American Palm Populations and Communities

et al. 2011

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We review resilience to natural and anthropogenic disturbance of palm populations and communities in tropical America. Response of palms to disturbance depends on their morphological traits, their reproductive strategies and the impacts of these traits and strategies on phenology and gene flow. Human impact induces changes in genetic structure, increasing endogamy and genetic drift in fragmented populations. Forest fragmentation and harvest of palm organs are well documented whereas effects of intermediate disturbance like selective logging, hunting or fire remain poorly known. We recommend emphasis on long-term experiments and on the use of mechanistic approaches in future research to facilitate integration of available data into a theoretical ecological framework.

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“…Naturally occurring fragmentation processes have recently been intensified by anthropogenic activity (Rimbaldi and Oliveira, 2003), particularly by intensive agriculture and land conversion to pasture, which have generated mosaics of original vegetation fragments embedded within highly transformed matrices (Arroyo-Rodríguez et al, 2007). Fragmentation affects ecological and genetic processes (Couvet, 2002;Lowe et al, 2005) by altering rates of genetic drift, endogamy, and selection in isolated, remnant populations (Rimbaldi and Oliveira, 2003).…”

Section: Introductionmentioning

confidence: 99%

Population genetic structure of Attalea vitrivir Zona (Arecaceae) in fragmented areas of southeast Brazil

Santos

Cavallari²,

Pimenta

et al. 2015

Genet. Mol. Res.

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ABSTRACT. Attalea vitrivir Zona (synonym Orbignya oleifera) is one of the six species of Arecaceae known as "babassu". This species is used to make cosmetics, food, and detergents due to the high concentration of oil in the seeds. It is found only in fragmented areas of southern Bahia State and northern Minas Gerais State, southeast Brazil, and this fragmentation has affected both its ecological and genetic characteristics. We evaluated the genetic diversity and population genetic structure of A. vitrivir in six areas of two different regions at the extremes of its geographical range, in order to gain a better understanding of the factors that affect the distribution and partitioning of its diversity. Nine inter simple sequence Population genetic structure of Attalea vitrivir (babassu) repeat (ISSR) markers amplified 74 polymorphic bands, resulting in large diversity values (Shannon diversity index, 0.37-0.47; intrapopulation genetic diversity, 0.25-0.34). Analysis of molecular variance (AMOVA) revealed considerable differentiation between sampling sites (30.03%) and regions (12.08%), although most of the diversity was observed within sampling sites (69%). Further differentiation between sampling sites was noted more in the northern region than in the southern region, highlighting the genetic connectivity between the sampling sites within Rio Pandeiros Environmental Protection Area (southern region). The identification of two distinct genetic clusters (K = 2) corresponded to the northern and southern regions, and corroborated the AMOVA results. We suggest that the northern area, outside Rio Pandeiros Environmental Protection Area, must be included in future management plans for this species.

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Impact of rain forest fragmentation on the population size of a structurally important palm species: Astrocaryum mexicanum at Los Tuxtlas, Mexico

Cited by 53 publications

References 44 publications

Effects of climate and forest structure on palms, bromeliads and bamboos in Atlantic Forest fragments of Northeastern Brazil

Effects of climate and forest structure on palms, bromeliads and bamboos in Atlantic Forest fragments of Northeastern Brazil

Disturbance and Resilience in Tropical American Palm Populations and Communities

Population genetic structure of Attalea vitrivir Zona (Arecaceae) in fragmented areas of southeast Brazil

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