Neotropical Savannas and Seasonally Dry Forests

Neotropical Savannas and Seasonally Dry Forests
Title Neotropical Savannas and Seasonally Dry Forests PDF eBook
Author R. Toby Pennington
Publisher CRC Press
Pages 554
Release 2006-05-25
Genre Science
ISBN 1000611310

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More often than not, when people think of a neotropical forest, what comes to mind is a rain forest, rather than a dry forest. Just as typically, when they imagine a savanna, they visualize the African plains, rather than those dry woodlands and grasslands found in the Neotropics. These same preconceptions can be found among scientists, as these ne

Seasonally Dry Tropical Forests

Seasonally Dry Tropical Forests
Title Seasonally Dry Tropical Forests PDF eBook
Author Rodolfo Dirzo
Publisher Island Press
Pages 409
Release 2011-02-18
Genre Nature
ISBN 159726704X

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Seasonally Dry Tropical Forests brings together a range of experts in diverse fields including biology, ecology, biogeography, and biogeochemistry, to review, synthesize, and explain the current state of our collective knowledge on the ecology and conservation of this endangered ecosystem. The book offers a synthetic and cross-disciplinary review of recent work with an expansive scope, including sections on distribution, diversity, ecosystem function, and human impacts. Throughout, contributors emphasize conservation issues, particularly emerging threats and promising solutions, with key chapters on climate change, fragmentation, restoration, ecosystem services, and sustainable use. Seasonally dry tropical forests represent scientific terrain that is poorly explored, and there is an urgent need for increased understanding. This book represents an important step in bringing together the most current scientific information about this vital ecosystem.

Neotropical Savannas and Seasonally Dry Forests

Neotropical Savannas and Seasonally Dry Forests
Title Neotropical Savannas and Seasonally Dry Forests PDF eBook
Author R. Toby Pennington
Publisher CRC Press
Pages 509
Release 2006-05-25
Genre Science
ISBN 1420004492

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More often than not, when people think of a neotropical forest, what comes to mind is a rain forest, rather than a dry forest. Just as typically, when they imagine a savanna, they visualize the African plains, rather than those dry woodlands and grasslands found in the Neotropics. These same preconceptions can be found among scientists, as these ne

Savannas and Dry Forests

Savannas and Dry Forests
Title Savannas and Dry Forests PDF eBook
Author Andrea Berardi
Publisher Routledge
Pages 294
Release 2017-05-15
Genre Science
ISBN 1351902083

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Parched landscapes, biodiversity loss, encroaching deserts and deforestation are some of the environmental crises taking place in tropical savannas and dry forests throughout the world. To date, much research into these regions has treated humans as 'outside' or as an 'impact' only. However, over and over again, examples show that, in fact, humans are not external factors, but integral components of these systems. Humans are key determinants of savannas and dry forests, affecting patterns and processes, as well as impacts on natural resources. Unless we understand the human-environment relationship in these regions, we will never truly identify the causes or be able to provide solutions. This book therefore focuses on the roles of the past, present and future human perceptions and actions on savannas and dry forests. It examines how the views of local farmers, NGO workers, government officials and international scientists differ on the links between the social and ecological components of savannas. It deals with these multiple perspectives by using systems diagramming and conceptual modelling to provide a clearer and more explicit understanding and to promote better communication between the various actors concerned.

Characterisation of Neotropical Savanna and Seasonally Dry Forest Ecosystems by Their Modern Pollen Rain

Characterisation of Neotropical Savanna and Seasonally Dry Forest Ecosystems by Their Modern Pollen Rain
Title Characterisation of Neotropical Savanna and Seasonally Dry Forest Ecosystems by Their Modern Pollen Rain PDF eBook
Author Huw Thomas Jones
Publisher
Pages 211
Release 2009
Genre
ISBN

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At present there is uncertainty over the response of neotropical ecosystems to the climatic changes of the Quaternary. The majority of vegetation reconstructions from the region are derived from fossil pollen records extracted from lake sediments. However, the interpretation of these records is restricted by limited knowledge of the contemporary relationships between the vegetation and pollen rain of neotropical ecosystems, especially for more open vegetation such as savanna and dry forest. This research aims to improve the interpretation of these records by investigating the relationship between the vegetation and modern pollen rain of different savanna and seasonally dry tropical forest (SDTF) ecosystems in Bolivia using artificial pollen traps and surface lake sediments to analyse the modern pollen rain. Vegetation data is used to identify taxa that are floristically important within the different ecosystems and to allow modern pollen/vegetation ratios to be calculated. The modern pollen rain from the upland savanna is dominated by Moraceae/Urticaceae (35.1%), Poaceae (29.6%), Alchornea (6.1%) and Cecropia (4.1%), whilst the seasonally-inundated savanna sites are dominated by Moraceae/Urticaceae (30.7%), Poaceae (19.5%), Cyperaceae (14.0%) and Cecropia (7.9%). These two different savanna ecosystems are only slightly differentiated by their modern pollen rain. The main taxa in the modern pollen rain of the upland SDTF are Moraceae/Urticaceae (25.8%), Cecropia (10.5%), Acalypha (7.6%) and Combretaceae/Melastomataceae (6.7%). Seasonally-inundated SDTF is dominated by Cecropia pollen to the extent that it was removed from the pollen sum and the main non-Cecropia pollen types are Moraceae/Urticaceae (39.0%), unknown type df 61 (6.4%), Asteraceae (6.3%), Celtis (6.0%) and Physocalymma scaberrimum (4.9%). These two SDTF ecosystems are well differentiated by their modern pollen rain, implying that they may be defined in fossil pollen records. The modern pollen rain obtained from the surface lake samples is generally complementary to that obtained from the artificial pollen traps for a given ecosystem. All sites have a high Moraceae/Urticaceae pollen signal due to effective dispersal of this pollen type from areas of evergreen forest in close proximity to the study sites. The savanna sites show lower Poaceae percentages than have been previously reported in the literature by some authors and this raises the possibility than the extent of this ecosystem in the past may have been underestimated. Modern pollen/vegetation ratios show that many key vegetation types are absent/under-represented within the modern pollen rain.

Seasonally Dry Tropical Forests

Seasonally Dry Tropical Forests
Title Seasonally Dry Tropical Forests PDF eBook
Author Stephen H. Bullock
Publisher Cambridge University Press
Pages 482
Release 1995-11-24
Genre Nature
ISBN 9780521435147

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Review of tropical dry forest biogeography, palaeontology, ecology and ecosystem functions.

Seasonally Dry Tropical Forests

Seasonally Dry Tropical Forests
Title Seasonally Dry Tropical Forests PDF eBook
Author Rodolfo Dirzo
Publisher Island Press
Pages 409
Release 2012-09-26
Genre Science
ISBN 1610910214

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Though seasonally dry tropical forests are equally as important to global biodiversity as tropical rainforests, and are one of the most representative and highly endangered ecosystems in Latin America, knowledge about them remains limited because of the relative paucity of attention paid to them by scientists and researchers and a lack of published information on the subject. Seasonally Dry Tropical Forests seeks to address this shortcoming by bringing together a range of experts in diverse fields including biology, ecology, biogeography, and biogeochemistry, to review, synthesize, and explain the current state of our collective knowledge on the ecology and conservation of seasonally dry tropical forests. The book offers a synthetic and cross-disciplinary review of recent work with an expansive scope, including sections on distribution, diversity, ecosystem function, and human impacts. Throughout, contributors emphasize conservation issues, particularly emerging threats and promising solutions, with key chapters on climate change, fragmentation, restoration, ecosystem services, and sustainable use. Seasonally dry tropical forests are extremely rich in biodiversity, and are seriously threatened. They represent scientific terrain that is poorly explored, and there is an urgent need for increased understanding of the system's basic ecology. Seasonally Dry Tropical Forests represents an important step in bringing together the most current scientific information about this vital ecosystem and disseminating it to the scientific and conservation communities.