scholarly journals Effect of temporal variation in precipitation on the demography of four herbaceous populations in a tropical dry forest area in Northeastern Brazil

2015 ◽  
Vol 63 (4) ◽  
pp. 903 ◽  
Author(s):  
Kleber Andrade da Silva ◽  
Juliana Ramos de Andrade ◽  
Josiene Maria Falcão Fraga dos Santos ◽  
Clarissa Gomes Reis Lopes ◽  
Elba Maria Nogueira Ferraz ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Tropical Dry Forest ◽  
Forest Area ◽  
Dry Forest ◽  
Northeastern Brazil ◽  
Modelo Lineal

En los bosques tropicales secos, la dinámica de las poblaciones herbáceas están fuertemente influenciadas por la variación estacional y anual de la precipitación total. Por otra parte, los acontecimientos presentes y pasados de anomalía climática (por ejemplo, años de sequía y lluvia errática antes de la temporada de crecimiento) pueden causar reducciones drásticas de tamaño de la población, lo que lleva a la desaparición temporal de algunas especies. Por lo tanto, este estudio tiene como objetivo evaluar, durante três años, la dinámica de <em>Delilia biflora</em> (Asteraceae), <em>Commelina obliqua</em> (Commelinaceae), <em>Phaseolus peduncularis</em> (Fabaceae) y <em>Euphorbia heterophylla</em> (Euphorbiaceae). El estudio se realizó en una zona de bosque seco tropical conocida como Caatinga, situado en la estación experimental del Instituto Agronómico de Pernambuco (IPA), en Caruaru, Pernambuco, Brasil. La Caatinga tiene un clima semiárido y fuerte variación estacional y anual de la precipitación total. Durante este estudio, hubo un evento de anomalía climática llamado la sequía de 2006 y la lluvia errática en la estación seca. El nacimiento, la muerte y la supervivencia fueron monitoreados mensualmente en 105 parcelas de 1 × 1 m. Las diferencias en densidad entre años y estaciones se evaluaron mediante la prueba de Kruskal-Wallis. El poder explicativo de la precipitación del presente y del pasado sobre la densidad se evaluó utilizando el Modelo Lineal Generalizado. En este estudio, fue el primer registro de <em>Euphorbia heterophylla</em> en el área de estudio. Las poblaciones estudiadas fueron mayores en los años más húmedos y durante la temporada de lluvias, y se redujeron drásticamente en el año más seco y en las estaciones secas. <em>Commelina obliqua</em> fue la menos sensible a la variación de la precipitación total. Con respecto a la densidad, las cuatro especies estuvieron presentes durante los tres años. Las tasas de natalidad fueron mayores durante la temporada de lluvias y las tasas de mortalidad fueron mayores en la estación seca. Lluvias esporádicas en la estación seca causado pronunciado reclutamiento de plántulas seguida de muerte y tuvo un fuerte impacto en la dinámica de <em>D. biflora</em>, <em>E. heterophylla</em> y <em>P. peduncularis</em>. La precipitación del año en curso explica entre el 3 % y 18 % de la variación interanual de la densidad y el poder explicativo de la precipitación del año anterior en la densidad de las poblaciones varió de 32 % a 67 %. Por lo tanto, los fenómenos climáticos del pasado también tienen una consecuencia significativa para las cuatro poblaciones. En conclusión, la drástica reducción de la precipitación total entre años podría ser un parámetro predictivo para el tamaño de la población de plantas herbáceas (en el momento presente y futuro) en una área de bosque tropical seco en el Noreste brasileño.

Temporal variation in the influence of forest succession on caterpillar communities: A long‐term study in a tropical dry forest 

Biotropica ◽  
2019 ◽  
Vol 51 (4) ◽  
pp. 529-537 ◽  
Author(s):  
Karina Boege ◽  
Edith Villa‐Galaviz ◽  
Antonio López‐Carretero ◽  
Rubén Pérez‐Ishiwara ◽  
Alejandro Zaldivar‐Riverón ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Forest Succession ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Term Study ◽  
Long Term Study

scholarly journals Diversity of longhorned beetles (Coleoptera: Cerambycidae) in the Caribbean region of Colombia: temporal variation between two fragments of tropical dry forest

2021 ◽  
Vol 21 (3) ◽  
Author(s):  
Kimberly García ◽  
Neis José Martínez ◽  
Juan Pablo Botero
Keyword(s):  
Temporal Variation ◽  
Tropical Dry Forest ◽  
Species Abundance ◽  
Canopy Cover ◽  
Dry Forest ◽  
Caribbean Region ◽  
True Diversity ◽  
Longhorned Beetles ◽  
The Caribbean ◽  
Spatio Temporal

Abstract: The tropical dry forest is under constant threat from many anthropic activities which are conducted indiscriminately, modifying the forest, and therefore, affecting species that are closely related to its phenology, such as longhorned beetles (Cerambycidae). The spatio-temporal variation of the cerambycid diversity in two fragments of tropical dry forest (Reserva Campesina la Montaña and La Flecha) in the Caribbean region of Colombia was analyzed. At each locality, four squared plots were delimited, and the beetles were collected with fruit traps, beating sheets and manual capture, and with light traps in the center. Five hundred eighty-seven specimens representing 128 species were collected, of which members of the tribe Ectenessini (Cerambycinae) were the most abundant. At the subfamily level, Cerambycinae was the most abundant (465 specimens) and diverse (73 species), followed by Lamiinae and Prioninae. The highest values of richness (110 species), abundance (428), biomass (21.18 g), and as well as the highest values of true diversity (1D= 73.44, 2D= 34.30) were found during the first precipitations. Regarding beta diversity, temporal variation was determined and mainly explained by a high percentage of turnover (> 70%). Lastly, the high diversity of Cerambycidae was associated with high values of relative humidity and canopy cover during the rainy season. This showed that the structure of the cerambycid community in the tropical dry forest of the Caribbean region of Colombia depends on these variables, which are closely related to precipitation.

scholarly journals Temporal Variation in the Diversity of Cantharidae (Coleoptera), in Seven Assemblages in Tropical Dry Forest in Mexico

2016 ◽  
Vol 9 (1) ◽  
pp. 439-464 ◽  
Author(s):  
Cisteil Xinum Pérez Hernández ◽  
Santiago Zaragoza Caballero
Keyword(s):  
Temporal Variation ◽  
Tropical Dry Forest ◽  
Dry Forest

scholarly journals Mapping soil carbon, particle-size fractions, and water retention in tropical dry forest in Brazil

2016 ◽  
Vol 51 (9) ◽  
pp. 1371-1385 ◽  
Author(s):  
Gustavo Mattos Vasques ◽  
Maurício Rizzato Coelho ◽  
Ricardo Oliveira Dart ◽  
Ronaldo Pereira Oliveira ◽  
Wenceslau Geraldes Teixeira
Keyword(s):  
Particle Size ◽  
Soil Properties ◽  
Ordinary Kriging ◽  
Water Retention ◽  
Tropical Dry Forest ◽  
Forest Area ◽  
Dry Forest ◽  
Organic Carbon Content ◽  
Size Fractions ◽  
Particle Size Fractions

Abstract The objective of this work was to compare ordinary kriging with regression kriging to map soil properties at different depths in a tropical dry forest area in Brazil. The 11 soil properties evaluated were: organic carbon content and stock; bulk density; clay, sand, and silt contents; cation exchange capacity; pH; water retention at field capacity and at permanent wilting point; and available water. Samples were taken from 327 sites at 0.0-0.10, 0.10-0.20, and 0.20-0.40-m depths, in a tropical dry forest area of 102 km2. Stepwise linear regression models for particle-size fractions and water retention properties had the best fit. Relief and parent material covariates were selected in 31 of the 33 models (11 properties at three depths) and vegetation covariates in 29 models. Based on external validation, ordinary kriging obtained higher accuracy for 21 out of 33 property x depth combinations, indicating that the inclusion of a linear trend model before kriging does not necessarily improve predictions. Therefore, for similar studies, the geostatistical methods employed should be compared on a case-by-case basis.

scholarly journals Hymenochaete cifuentesii, H. potosina, and H. raduloides spp. nov. from the tropical dry forest of Mexico

Mycotaxon ◽  
2018 ◽  
Vol 133 (3) ◽  
pp. 499-512 ◽  
Author(s):  
Magdalena Contreras-Pacheco ◽  
Ricardo Valenzuela ◽  
Tania Raymundo ◽  
Leticia Pacheco
Keyword(s):  
Tropical Dry Forest ◽  
Dry Forest

Dynamic seed zones to guide climate-smart seed sourcing for tropical dry forest restoration in Colombia

2021 ◽  
Vol 490 ◽  
pp. 119127
Author(s):  
Tobias Fremout ◽  
Evert Thomas ◽  
Kelly Tatiana Bocanegra-González ◽  
Carolina Adriana Aguirre-Morales ◽  
Anjuly Tatiana Morillo-Paz ◽  
...  
Keyword(s):  
Forest Restoration ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Seed Zones ◽  
Dry Forest Restoration ◽  
Seed Sourcing

scholarly journals Spondias tuberosa Arruda (Anacardiaceae), a threatened tree of the Brazilian Caatinga?

2016 ◽  
Vol 77 (3) ◽  
pp. 542-552 ◽  
Author(s):  
J. Mertens ◽  
J. Germer ◽  
J. A. Siqueira Filho ◽  
J. Sauerborn
Keyword(s):  
Tropical Dry Forest ◽  
Threat Assessment ◽  
Red List ◽  
Dry Forest ◽  
International Union ◽  
Population Decrease ◽  
Domestic Ruminants ◽  
Spondias Tuberosa ◽  
Iucn Assessment ◽  
Additional Income

Abstract Spondias tuberosa Arr., a fructiferous tree endemic to the northeast Brazilian tropical dry forest called Caatinga, accounts for numerous benefits for its ecosystem as well as for the dwellers of the Caatinga. The tree serves as feed for pollinators and dispersers as well as fodder for domestic ruminants, and is a source of additional income for local smallholders and their families. Despite its vantages, it is facing several man-made and natural threats, and it is suspected that S. tuberosa could become extinct. Literature review suggests that S. tuberosa suffers a reduced regeneration leading to population decrease. At this juncture S. tuberosa cannot be considered threatened according to the International Union for Conservation of Nature Red List Categories and Criteria, as it has not yet been assessed and hampered generative regeneration is not considered in the IUCN assessment. The combination of threats, however, may have already caused an extinction debt for S. tuberosa. Due to the observed decline in tree density, a thorough assessment of the S. tuberosa population is recommended, as well as a threat assessment throughout the entire Caatinga.

scholarly journals Identification of spectral features in the longwave infrared (LWIR) spectra of leaves for the discrimination of tropical dry forest tree species

2021 ◽  
Vol 97 ◽  
pp. 102286
Author(s):  
Yaqian Long ◽  
Benoit Rivard ◽  
Arturo Sanchez-Azofeifa ◽  
Russell Greiner ◽  
Dominica Harrison ◽  
...  
Keyword(s):  
Tree Species ◽  
Tropical Dry Forest ◽  
Forest Tree ◽  
Dry Forest ◽  
Spectral Features ◽  
Forest Tree Species

Unraveling the drivers of plant taxonomic and phylogenetic β-diversity in a human-modified tropical dry forest

2021 ◽  
Author(s):  
Kátia F. Rito ◽  
Víctor Arroyo-Rodríguez ◽  
Jeannine Cavender-Bares ◽  
Edgar E. Santo-Silva ◽  
Gustavo Souza ◽  
...  
Keyword(s):  
Tropical Dry Forest ◽  
Dry Forest ◽  
Β Diversity
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