Long-term effects of habitat fragmentation on mating patterns and gene flow of a tropical dry forest tree, Ceiba aesculifolia (Malvaceae: Bombacoideae)

2013 ◽  
Vol 100 (6) ◽  
pp. 1095-1101 ◽  
Author(s):  
Mauricio Quesada ◽  
Yvonne Herrerías-Diego ◽  
Jorge A. Lobo ◽  
Gumersindo Sánchez-Montoya ◽  
Fernando Rosas ◽  
...  
Keyword(s):  
Gene Flow ◽  
Habitat Fragmentation ◽  
Tropical Dry Forest ◽  
Forest Tree ◽  
Dry Forest ◽  
Long Term Effects ◽  
Mating Patterns ◽  
Ceiba Aesculifolia

Effect of forest fragmentation on fruit and seed predation of the tropical dry forest tree Ceiba aesculifolia

2008 ◽  
Vol 141 (1) ◽  
pp. 241-248 ◽  
Author(s):  
Yvonne Herrerías-Diego ◽  
Mauricio Quesada ◽  
Kathryn E. Stoner ◽  
Jorge A. Lobo ◽  
Yared Hernández-Flores ◽  
...  
Keyword(s):  
Forest Fragmentation ◽  
Seed Predation ◽  
Tropical Dry Forest ◽  
Forest Tree ◽  
Dry Forest ◽  
Ceiba Aesculifolia

Genetic Differentiation in Isolated Populations of Hakea carinata (Proteaceae)

1998 ◽  
Vol 46 (6) ◽  
pp. 671 ◽  
Author(s):  
G. J. Starr ◽  
S. M. Carthew
Keyword(s):  
Gene Flow ◽  
Habitat Fragmentation ◽  
Gene Diversity ◽  
South Australia ◽  
Similar Species ◽  
Isolated Populations ◽  
Plant Populations ◽  
Evolutionary Condition ◽  
Private Alleles

Fragmentation of the landscape by human activity has created small, isolated plant populations. Hakea carinata F. Muell. ex Meissner, a sclerophyllous shrub, is common in isolated fragments of vegetation in South Australia. This study investigated whether habitat fragmentation has caused restrictions to gene flow between populations. Gene diversity (HT = 0.317) is average for similar species but little is held within populations (HS = 0.168) and 46.9% of gene diversity is accounted for between populations. Estimates of gene flow are NM = 0.270 (based on FST) and NM = 0.129 (based on private alleles). Populations are substantially selfing (t = 0.111). Small isolated populations appears to be a long-term evolutionary condition in this species rather than a consequence of habitat fragmentation; however, population extinctions are occurring. Conservation will require the reservation of many populations to represent the genetic variation present in the species.

scholarly journals Seedling Survival and Growth of Tree Species: Site Condition and Seasonality in Tropical Dry Forest Restoration

2014 ◽  
Vol 90 (3) ◽  
pp. 313
Author(s):  
CLAUDIA ALVAREZ-AQUINO ◽  
GUADALUPE WILLIAMS-LINERA
Keyword(s):  
Forest Restoration ◽  
Seedling Survival ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Cedrela Odorata ◽  
Guazuma Ulmifolia ◽  
Survival And Growth ◽  
Tabebuia Rosea ◽  
Dry Forest Restoration ◽  
Ceiba Aesculifolia

La restauración del bosque tropical seco es prioritaria por ser el bosque más amenazado. En Veracruz, el bosque seco se ha reducido al 7% de su cobertura original. Nuestro objetivo fue determinar el efecto de la condición del sitio a restaurar y la estacionalidad en la supervivencia y tasa de crecimiento relativo en altura y diámetro de especies de árboles nativos. Estudiamos el desempeño de plántulas durante dos estaciones secas y dos lluviosas, y el efecto de la vegetación leñosa existente > 1 m de altura. Se trasplantaron 960 plantas: 40 individuos de seis especie (Cedrela odorata, Ceiba aesculifolia, Guazuma ulmifolia, Ipomoea wolcottiana, Luehea candida, Tabebuia rosea) en cuatro sitios abandonados. La supervivencia y la tasa de crecimiento relativo se registraron cada cuatro meses durante dos años. La mayor supervivencia se observó en sitios con mayor riqueza de especies arbóreas y la tasa de crecimiento relativo en altura estuvo positivamente correlacionada con la altura de la vegetación existente. La mayor tasa de crecimiento relativo para especies y sitios se registró durante la estación lluviosa. En el sitio con menos vegetación, el desempeño de las plántulas fue pobre y sólo Guazuma sobrevivió. Ceiba mostró la mayor supervivencia (82-90%) pero una tasa de crecimiento relativo baja; Guazuma presentó una supervivencia elevada (20-94%) y la mayor tasa de crecimiento relativo; Cedrela mostró la menor supervivencia (3-7%) y tasa de crecimiento relativo alta. Los resultados sugieren que la vegetación del sitio, la estacionalidad y las especies afectan el desempeño de las plántulas durante el establecimiento temprano. La implicación en términos de la restauración ecológica es la importancia de aprovechar la vegetación existente aunque ésta sea escasa.

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 Long-Term Effects of Fuels Treatments, Overstory Structure, and Wildfire on Tree Regeneration in Dry Forests of Central Washington

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 888
Author(s):  
Allison K. Rossman ◽  
Jonathan D. Bakker ◽  
David W. Peterson ◽  
Charles B. Halpern
Keyword(s):  
Prescribed Burning ◽  
Basal Area ◽  
Tree Regeneration ◽  
Dry Forest ◽  
Permanent Plots ◽  
Long Term Effects ◽  
Fuels Reduction ◽  
Forest Fuels ◽  
Fuels Treatments

The long-term effectiveness of dry-forest fuels treatments (restoration thinning and prescribed burning) depends, in part, on the pace at which trees regenerate and recruit into the overstory. Knowledge of the factors that shape post-treatment regeneration and growth is limited by the short timeframes and simple disturbance histories of past research. Here, we present results of a 15-year fuels-reduction experiment in central Washington, including responses to planned and unplanned disturbances. We explore the changing patterns of Douglas-fir regeneration in 72 permanent plots (0.1 ha) varying in overstory abundance (a function of density and basal area) and disturbance history—the latter including thinning, prescribed burning, and/or wildfire. Plots were measured before treatment (2000/2001), soon afterwards (2004/2005), and more than a decade later (2015). Thinning combined with burning enhanced sapling recruitment (ingrowth) into the overstory, although rates of ingrowth were consistently low and greatly exceeded by mortality. Relationships between seedling frequency (proportion of quadrats within a plot) and overstory abundance shifted from weakly negative before treatment to positive after thinning, to neutral in the longer term. However, these relationships were overshadowed by more recent, higher-severity prescribed fire and wildfire that stimulated seedling establishment while killing advanced regeneration and overstory trees. Our results highlight the dependence of regeneration responses on the history of, and time since, fuels treatment and subsequent disturbance. Managers must be aware of this spatial and temporal complexity and plan for future disturbances that are inevitable but unpredictable in timing and severity.

Long-term (33 years) rainfall and runoff dynamics in a tropical dry forest ecosystem in western Mexico: Management implications under extreme hydrometeorological events

2018 ◽  
Vol 426 ◽  
pp. 7-17 ◽  
Author(s):  
Manuel Maass ◽  
Raúl Ahedo-Hernández ◽  
Salvador Araiza ◽  
Abel Verduzco ◽  
Angelina Martínez-Yrízar ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Management Implications ◽  
Western Mexico ◽  
Runoff Dynamics
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