Weedy and secundary palm species in central amazonian forest Fragments

Scariot, Aldicìr

doi:10.1590/s0102-33062001000200012

Cited by 12 publications

(10 citation statements)

References 22 publications

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“…). Pioneer and opportunistic trees are increasing in all fragments, but the composition of these secondary plant species and their rates of increase differ markedly among the three ranches (Scariot, ; Laurance et al, 2006 a , ; Nascimento et al, ). A similar pattern of biotic divergence is evident in the secondary‐forest bat assemblages found at the different ranches (Bobrowiec & Gribel, )…”

Section: Dynamics Of Forest Fragmentsmentioning

confidence: 92%

“…For example, forest‐simulation models parameterized with BDFFP data suggest that even small ( < 10 ha) fragments will require a century or more to stabilize in floristic composition and carbon storage (Groeneveld et al, ), given the long‐lived nature of many tropical trees. Eventually, these fragments might experience a fundamental reorganization of their plant communities, given major shifts in the composition of their tree, palm, liana and herb seedlings (Scariot, ; Benítez‐Malvido & Martinez‐Ramos, 2003 b ; Brum et al, ) relative to those in intact forest. If these newly recruited plants represent the future of the forest, then the BDFFP fragments could eventually experience dramatic changes in floristic composition, comparable to those observed in some other tropical forests that have long been fragmented (e.g.…”

Section: General Lessonsmentioning

confidence: 99%

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An Amazonian rainforest and its fragments as a laboratory of global change

et al. 2017

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We synthesize findings from one of the world's largest and longest-running experimental investigations, the Biological Dynamics of Forest Fragments Project (BDFFP). Spanning an area of ∼1000 km in central Amazonia, the BDFFP was initially designed to evaluate the effects of fragment area on rainforest biodiversity and ecological processes. However, over its 38-year history to date the project has far transcended its original mission, and now focuses more broadly on landscape dynamics, forest regeneration, regional- and global-change phenomena, and their potential interactions and implications for Amazonian forest conservation. The project has yielded a wealth of insights into the ecological and environmental changes in fragmented forests. For instance, many rainforest species are naturally rare and hence are either missing entirely from many fragments or so sparsely represented as to have little chance of long-term survival. Additionally, edge effects are a prominent driver of fragment dynamics, strongly affecting forest microclimate, tree mortality, carbon storage and a diversity of fauna. Even within our controlled study area, the landscape has been highly dynamic: for example, the matrix of vegetation surrounding fragments has changed markedly over time, succeeding from large cattle pastures or forest clearcuts to secondary regrowth forest. This, in turn, has influenced the dynamics of plant and animal communities and their trajectories of change over time. In general, fauna and flora have responded differently to fragmentation: the most locally extinction-prone animal species are those that have both large area requirements and low tolerance of the modified habitats surrounding fragments, whereas the most vulnerable plants are those that respond poorly to edge effects or chronic forest disturbances, and that rely on vulnerable animals for seed dispersal or pollination. Relative to intact forests, most fragments are hyperdynamic, with unstable or fluctuating populations of species in response to a variety of external vicissitudes. Rare weather events such as droughts, windstorms and floods have had strong impacts on fragments and left lasting legacies of change. Both forest fragments and the intact forests in our study area appear to be influenced by larger-scale environmental drivers operating at regional or global scales. These drivers are apparently increasing forest productivity and have led to concerted, widespread increases in forest dynamics and plant growth, shifts in tree-community composition, and increases in liana (woody vine) abundance. Such large-scale drivers are likely to interact synergistically with habitat fragmentation, exacerbating its effects for some species and ecological phenomena. Hence, the impacts of fragmentation on Amazonian biodiversity and ecosystem processes appear to be a consequence not only of local site features but also of broader changes occurring at landscape, regional and even global scales.

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Section: Dynamics Of Forest Fragmentsmentioning

confidence: 92%

Section: General Lessonsmentioning

confidence: 99%

An Amazonian rainforest and its fragments as a laboratory of global change

et al. 2017

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“…It is a small, rhizomatous, clonal palm occurring in lowland forest on terra firme, or on periodically inundated flood plains (Henderson, 1995;Scariot, 2001). Irapay is of particular importance in the greater Iquitos region of Peru, where tens of thousands of houses are thatched with its leaves.…”

Section: Palm Thatchmentioning

confidence: 99%

Trade in Palm Products in North-Western South America

et al. 2011

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“…The efficiency of leaves for light interception, the ability to convert this energy into carbohydrates, as well as its transport and metabolism in the different parts within the tree are factors that influence the growth and survival of palm trees developing in adversity (Scariot, 2001). For exemplo, young plants of Euterpe edulis Martius (Arecaceae) showed greater survival index in environment with greater light availability, than in shaded environment (Ribeiro et al, 2011), as well as Copernicia prunifera (Miller) H. E. Moore (Arecaceae) that developed better when growing at full sunlight when compared to plants growing under 50% of shading (Reis et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Initial development of licuri (Syagrus coronata (Mart.) Becc.) –Arecaceae seedlings under different substrates and luminosity levels

2017

Aust. J. Basic & Appl. Sci.

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A R T I C L E I N F O A B S T R A C TLicuri is a palm tree typical of the Brazilian Northeast semi-arid region and of great socioeconomic importance for communities in the region. Despite its importance, few works were developed addressing its propagation and conservation. Studies about luminosity levels and different substrates may result in different growth responses, optimizing the production of seedlings. Therefore, the aim of this study was to evaluate the initial growth and compare the leaf anatomy of licuri seedlings subjected to different substrates and light levels. Licuri seedlings were conditioned in full sun and 50% shading, and the substrates sand, vegetal soil, sand mixed with organic compound and vegetal soil mixed with organic compound. After 90 days of cultivation, was evaluating growth and foliar anatomy. The shoot height, total leaf area, number of leaves, leaf dry weight, stem dry weight and root dry weight showed higher values in the seedlings grown in 50% shading. In full sun, there was an increase only for stem diameter. The dry weight of the root was significantly greater in sand or vegetal soil. For the total leaf area, the same substrates, however, with the presence of the organic compound, presented higher values. Seedlings grown under full sun provided greater thicknesses of adaxial epidermis and adaxial hypodermis. The abaxial epidermis, abaxial hypodermis and mesophyll presented greater thicknesses, regardless of the luminosity tested, in the substrates that contained vegetal soil, with or without the presence of organic compound. The use of sand or vegetable soil and the shaded environment provide better conditions for the production of licuri seedlings. Foliar anatomical analysis is a good indicator to verify the quality of licuri seedlings when grown under different environmental conditions.

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Weedy and secundary palm species in central amazonian forest Fragments

Cited by 12 publications

References 22 publications

An Amazonian rainforest and its fragments as a laboratory of global change

An Amazonian rainforest and its fragments as a laboratory of global change

Trade in Palm Products in North-Western South America

Initial development of licuri (Syagrus coronata (Mart.) Becc.) –Arecaceae seedlings under different substrates and luminosity levels

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