Diversity and Floristic Composition of Lowland Tropical Forest in Africa and South America

2018 ◽  
pp. 500-547 ◽  
Author(s):  
Alwyn H. Gentry
Keyword(s):  
South America ◽  
Tropical Forest ◽  
Floristic Composition ◽  
Lowland Tropical Forest

scholarly journals DNA barcodes of birds from northern Colombia

2021 ◽  
Vol 9 ◽  
Author(s):  
Paulo Pulgarín-R ◽  
Martha Olivera-Angel ◽  
Luisa Ortíz ◽  
Duván Nanclares ◽  
Sara Velásquez-Restrepo ◽  
...  
Keyword(s):  
South America ◽  
Tropical Forest ◽  
Dna Barcode ◽  
Bird Species ◽  
Taxonomic Identification ◽  
Dna Barcodes ◽  
Laboratory Methods ◽  
Blood Samples ◽  
Lowland Tropical Forest ◽  
Coi Sequences

DNA barcode datasets are a useful tool for conservation and aid in taxonomic identification, particularly in megadiverse tropical countries seeking to document and describe its biota, which is dropping at an alarming rate during recent decades. Here we report the barcodes for several low elevation bird species from northern Colombia with the goal to provide tools for species identification in this region of South America. We blood-sampled birds in a lowland tropical forest with various degrees of intervention using standard 3 × 12 m mist-nets. We extracted DNA and sequenced the COI barcode gene using standard primers and laboratory methods. We obtained 26 COI sequences from 18 species, 10 families and three orders and found that barcodes largely matched (but not always) phenotypic identification (> 90%) and they also facilitated the identification of several challenging passerine species. Despite our reduced sampling, our study represents the first attempt to document COI barcodes for birds (from blood samples) in this part of Colombia, which fills a considerable gap of sampling in this part of South America.

scholarly journals DNA barcodes from northern birds of Colombia

2021 ◽  
Author(s):  
Paulo Pulgarín-R ◽  
Martha Olivera-Angel ◽  
Luisa Ortíz ◽  
Duván Nanclares ◽  
Sara Velásquez-Restrepo ◽  
...  
Keyword(s):  
South America ◽  
Tropical Forest ◽  
Dna Barcode ◽  
Bird Species ◽  
Taxonomic Identification ◽  
Dna Barcodes ◽  
Laboratory Methods ◽  
Blood Samples ◽  
Lowland Tropical Forest ◽  
Coi Sequences

DNA barcode datasets are a useful tool for conservation and aid in taxonomic identification, particularly in megadiverse tropical countries seeking to document and describe its biota, which is dropping at an alarming rate during recent decades. Here we report the barcodes for several low elevation bird species from northern Colombia with the goal to provide tools for species identification in this region of South America. We blood sampled birds in a lowland tropical forest with various degrees of intervention using standard 10 × 12 mist-nets. We extracted DNA and sequenced the COI barcode gene using standard primers and laboratory methods. We obtained 28 COI sequences from 19 species, 10 families and 3 orders and found that barcodes largely matched (but not always) phenotypic identification (>90%) and they also facilitated the identification of several challenging passerine species. Despite our reduced sampling, our study represents the first attempt to document COI barcodes for birds (from blood samples) in this part of Colombia, which fills a considerable gap of sampling in this part of South America.

Structure and floristic composition of tree stand in tropical forest in the Eastern Ghats of northern Andhra Pradesh, India

2011 ◽  
Vol 22 (4) ◽  
pp. 491-500 ◽  
Author(s):  
C. Sudhakar Reddy ◽  
Shilpa Babar ◽  
Giriraj Amarnath ◽  
Chiranjibi Pattanaik
Keyword(s):  
Tropical Forest ◽  
Andhra Pradesh ◽  
Floristic Composition ◽  
Eastern Ghats ◽  
Tree Stand

scholarly journals A Comparison of LUCC Detection Algorithms in a Mesoamerican Lowland Tropical Forest

2021 ◽  
Vol 45 (2) ◽  
pp. 101-113
Author(s):  
Laurel Sutter ◽  
David López-Carr
Keyword(s):  
Tropical Forest ◽  
Lowland Tropical Forest ◽  
Detection Algorithms

scholarly journals Monitoring Vegetation Change in the Presence of High Cloud Cover with Sentinel-2 in a Lowland Tropical Forest Region in Brazil

2020 ◽  
Vol 12 (11) ◽  
pp. 1829
Author(s):  
Tatiana Nazarova ◽  
Pascal Martin ◽  
Gregory Giuliani
Keyword(s):  
Tropical Forest ◽  
Temporal Resolution ◽  
Cloud Cover ◽  
Detection System ◽  
Forest Degradation ◽  
High Cloud ◽  
Lowland Tropical Forest ◽  
Forest Region ◽  
Vegetation Loss ◽  
Sentinel 2

Forests play major roles in climate regulation, ecosystem services, carbon storage, biodiversity, terrain stabilization, and water retention, as well as in the economy of numerous countries. Nevertheless, deforestation and forest degradation are rampant in many parts of the world. In particular, the Amazonian rainforest faces the constant threats posed by logging, mining, and burning for agricultural expansion. In Brazil, the “Sete de Setembro Indigenous Land”, a protected area located in a lowland tropical forest region at the border between the Mato Grosso and Rondônia states, is subject to illegal deforestation and therefore necessitates effective vegetation monitoring tools. Optical satellite imagery, while extensively used for landcover assessment and monitoring, is vulnerable to high cloud cover percentages, as these can preclude analysis and strongly limit the temporal resolution. We propose a cloud computing-based coupled detection strategy using (i) cloud and cloud shadow/vegetation detection systems with Sentinel-2 data analyzed on the Google Earth Engine with deep neural network classification models, with (ii) a classification error correction and vegetation loss and gain analysis tool that dynamically compares and updates the classification in a time series. The initial results demonstrate that such a detection system can constitute a powerful monitoring tool to assist in the prevention, early warning, and assessment of deforestation and forest degradation in cloudy tropical regions. Owing to the integrated cloud detection system, the temporal resolution is significantly improved. The limitations of the model in its present state include classification issues during the forest fire period, and a lack of distinction between natural vegetation loss and anthropogenic deforestation. Two possible solutions to the latter problem are proposed, namely, the mapping of known agricultural and bare areas and its subsequent removal from the analyzed data, or the inclusion of radar data, which would allow a large amount of finetuning of the detection processes.

scholarly journals Tropical forest soil carbon stocks do not increase despite 15 years of doubled litter inputs

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Emma J. Sayer ◽  
Luis Lopez-Sangil ◽  
John A. Crawford ◽  
Laëtitia M. Bréchet ◽  
Ali J. Birkett ◽  
...  
Keyword(s):  
Organic Matter ◽  
Tropical Forest ◽  
Critical Role ◽  
Tropical Soils ◽  
Soil Geochemistry ◽  
Soil Minerals ◽  
Litter Addition ◽  
Lowland Tropical Forest ◽  
Tropical Forest Soil ◽  
Underlying Mechanisms

AbstractSoil organic carbon (SOC) dynamics represent a persisting uncertainty in our understanding of the global carbon cycle. SOC storage is strongly linked to plant inputs via the formation of soil organic matter, but soil geochemistry also plays a critical role. In tropical soils with rapid SOC turnover, the association of organic matter with soil minerals is particularly important for stabilising SOC but projected increases in tropical forest productivity could trigger feedbacks that stimulate the release of stored SOC. Here, we demonstrate limited additional SOC storage after 13–15 years of experimentally doubled aboveground litter inputs in a lowland tropical forest. We combined biological, physical, and chemical methods to characterise SOC along a gradient of bioavailability. After 13 years of monthly litter addition treatments, most of the additional SOC was readily bioavailable and we observed no increase in mineral-associated SOC. Importantly, SOC with weak association to soil minerals declined in response to long-term litter addition, suggesting that increased plant inputs could modify the formation of organo-mineral complexes in tropical soils. Hence, we demonstrate the limited capacity of tropical soils to sequester additional C inputs and provide insights into potential underlying mechanisms.

The productivity, metabolism and carbon cycle of two lowland tropical forest plots in south-western Amazonia, Peru

2013 ◽  
Vol 7 (1-2) ◽  
pp. 85-105 ◽  
Author(s):  
Yadvinder Malhi ◽  
Filio Farfán Amézquita ◽  
Christopher E. Doughty ◽  
Javier E. Silva-Espejo ◽  
Cécile A.J. Girardin ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Tropical Forest ◽  
Lowland Tropical Forest
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