Vertical distance from drainage drives floristic composition changes in an Amazonian rainforest

Schietti, Juliana; Emilio, Thaíse; Rennó, Camilo Daleles; Drucker, Debora Pignatari; Costa, Flávia R. C.; Nogueira, Anselmo; Baccaro, Fabrício Beggiato; Figueiredo, Fernando O. G.; Castilho, Carolina V.; Kinupp, Valdely Ferreira; Guillaumet, Jean-Louis; Garcia, Ana Raquel M.; Lima, Albertina P.; Magnusson, William E.

doi:10.1080/17550874.2013.783642

Cited by 138 publications

(163 citation statements)

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“…The terra firme forests in the Amazonian region can be divided into plateau, slope, and valley habitats differing in their soil physico-chemical characteristics and drainage patterns (Hodnett et al 1997;Luizão et al 2004). In such contrasting habitats, differences in terrain height and inclination are accompanied by clear changes in floristic composition and diversity Laurance et al 2010;Schietti et al 2014), as well as effects on the local fauna (Menin et al 2007;Oliveira et al 2009; Cintra and Naka 2012). Previously, Silva et al (2011) surveyed one Biological Dynamics of Forest Fragments Project (BDFFP) reserve (Km 41, #1501) and reported that understory galling insect and host plant composition varied among terra firme plateau, slope, and valley; however, no difference was observed in galling insect richness among these habitats.…”

Section: Introductionmentioning

confidence: 99%

Understory host plant and insect gall diversity changes across topographic habitats differing in nutrient and water stress in the Brazilian Amazon rainforest

et al. 2017

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Topographic gradients in terra firme forests are associated with pronounced changes in soil texture, soil nutrients and distance to the water-table, thereby creating different hydric and nutritional conditions for plants and their associated herbivore community. The aim of this study was to investigate galling species and host plant richness and gall species composition across topographic habitats differing in nutrient and water stress in the Brazilian Amazon rainforest. Nineteen 250 x 3 m plots were randomly sampled in the valley, slope, plateau-slope transition, and plateau habitats in terra firme forests. All individual dicotyledonous plants 1 to 3 meters high were examined for the presence of insect galls. Galling species and host plant richness differed significantly among the studied habitats and were higher in slope habitats (drier habitats), as expected. More humid areas (valleys) showed the lowest richness of galling species, and a lower number of understory host plants. PERMANOVA and PERMDISP results demonstrated that the gall species composition differed significantly in the valley, slope, plateau-slope transition, and plateau areas. However, these structural differences in species composition could be due to unequal dispersion of variability among forest habitats. Our data suggested that spatial heterogeneity, such as a mosaic of local water status and nutrient availability resulting from the topographic conditions, can affect host plants and their associated galling insects. KEYWORDS: habitat stress, soil nutrients, species diversity, terra firme forest, topographic gradient Riqueza de insetos galhadores associados a habitats de sub-bosque com diferentes topografias e níveis de estresse hídrico e nutricional em uma floresta da Amazônia Central, Brasil RESUMOAs variações topográficas encontradas nas florestas de terra firme são acompanhadas por fortes mudanças no conteúdo de argila e concentração de nutrientes do solo, criando, portanto, diferentes condições hídricas e nutricionais para plantas e as comunidades de herbívoros associadas. O objetivo do presente estudo foi avaliar a riqueza e composição de espécies de insetos galhadores e suas plantas hospedeiras ao longo de um gradiente topográfico com habitats que diferem quanto ao estresse hídrico e nutricional. Dezenove parcelas de 250 x 3 m foram estabelecidos aleatoriamente em habitats de vertente, platô, transição platô-vertente e baixio, claramente distintos em áreas de terra firme. Todas as dicotiledôneas com 1 a 3 metros de altura foram examinadas quanto à presença de galhas de insetos. As galhas encontradas foram coletadas e insetos galhadores foram classificados em morfoespécies. A riqueza de galhadores e de plantas hospedeiras diferiram significativamente entre os habitats estudados, e como esperado, foi maior no habitat de vertente. As áreas mais úmidas (baixios) apresentaram menor riqueza de plantas hospedeiras no sub-bosque e, conseqüentemente, um número menor de espécies de galhadores. Os resultados das análises de PERMANOVA e P...

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Section: Introductionmentioning

confidence: 99%

Understory host plant and insect gall diversity changes across topographic habitats differing in nutrient and water stress in the Brazilian Amazon rainforest

et al. 2017

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“…A number of factors affect palm community at local and regional scale in tropical forests, such as soil physical and chemical characteristics, topography (slope and altitude), climate, hydrology and components of forest structure (Cintra et al, 2005;Costa et al, 2009;Eiserhardt et al, 2011;Emilio et al, 2014;Rodrigues et al, 2014;Schietti et al, 2014). The greater abundance of palms in forests with a given structure can be a result of specific preferences of the local species (Eiserhardt et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

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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“…In many cases, initiating collaborations between the data providers (the remote sensing community) and biodiversity-monitoring researchers is likely to provide an incentive for data sharing, as well as the technical know-how to develop new algorithms and provide data validation and calibration services to help with specific monitoring needs (Pettorelli et al 2016 -in press). In terms of institutional and individual capacity, access to training opportunities is vital, focusing on the use of free analysis tools, especially in developing countries (Asner et al 2011;Schietti et al 2014). Dissemination of and training in remote-sensing techniques through workshops (specifically aimed at ecologists and conservation practitioners), conferences, open access journals (e.g., RSEC; (Pettorelli et al 2014a); Nature Conservation; (Henle et al 2012) is important for building a new generation of scientists able to carry out integrated, multi-disciplinary approaches (Pettorelli et al 2014a).…”

Section: Building Capacity In Remote Sensing For Biodiversity Monitoringmentioning

confidence: 99%

Building capacity in biodiversity monitoring at the global scale

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Human-driven global change is causing ongoing declines in biodiversity worldwide. In order to address these declines, decision-makers need accurate assessments of the status of and pressures on biodiversity. However, these are heavily constrained by incomplete and uneven spatial, temporal and taxonomic coverage. For instance, data from regions such as Europe and North America are currently used overwhelmingly for large-scale biodiversity assessments due to lesser availability of suitable data from other, more biodiversity-rich, regions. These data-poor regions are often those experiencing the strongest threats to biodiversity, however. There is therefore an urgent need to fill the existing gaps in global biodiversity monitoring. Here, we review current knowledge on best practice in capacity building for biodiversity monitoring and provide an overview of existing means to improve biodiversity data collection considering the different types of biodiversity monitoring data. Our review comprises insights from work in Africa, South America, Polar Regions and Europe; in governmentfunded, volunteer and citizen-based monitoring in terrestrial, freshwater and marine ecosystems. The key steps to effectively building capacity in biodiversity monitoring are: identifying monitoring questions and aims; identifying the key components, functions, and processes to monitor; identifying the most suitable monitoring methods for these elements, carrying out monitoring activities; managing the resultant data; and interpreting monitoring data. Additionally, biodiversity monitoring should use multiple approaches including extensive and intensive monitoring through volunteers and professional scientists but also harnessing new technologies. Finally, we call on the scientific community to share biodiversity monitoring data, knowledge and tools to ensure the accessibility, interoperability, and reporting of biodiversity data at a global scale.4

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Vertical distance from drainage drives floristic composition changes in an Amazonian rainforest

Cited by 138 publications

References 78 publications

Understory host plant and insect gall diversity changes across topographic habitats differing in nutrient and water stress in the Brazilian Amazon rainforest

Understory host plant and insect gall diversity changes across topographic habitats differing in nutrient and water stress in the Brazilian Amazon rainforest

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

Building capacity in biodiversity monitoring at the global scale

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