Effects of deforestation on seed banks in a tropical deciduous forest of western Mexico

1999 ◽  
Vol 15 (2) ◽  
pp. 179-188 ◽  
Author(s):  
P. M. Miller
Keyword(s):  
Species Composition ◽  
Seed Bank ◽  
Growth Form ◽  
Deciduous Forest ◽  
Similarity Index ◽  
Tropical Deciduous Forest ◽  
Western Mexico ◽  
Pasture Grasses ◽  
One Year ◽  
Germinating Seeds

Seed density and seed bank species composition were determined by germination trials on soils collected during the initial phase of deforestation in a Mexican tropical deciduous forest. The reference forest, pre-burn, 1-d post-burn, and 1-y post-burn soils contained 700, 1000, 70 and 3500 germinating seeds m−2, of 30, 30, 8 and 13 species, respectively. A total of 43 dicotyledonous species were identified. Percentages of herbs, vines, shrubs and small trees/shrubs were similar in reference forest, pre-burn, and 1-d post-burn soils; herbs were the most common growth form. Pasture conversion greatly altered seed bank species composition; 81% of the species that germinated from the seed bank before burning were absent from the seed bank 1 d after the fires. One-year post-burn soil was dominated by monocots; only 3% of the seedlings were herbs; no vines, small trees/shrubs or trees germinated. The reference forest and the pre-burn soils had 18 dicot species in common and the highest similarity index, 0.43; six of the shared species were herbs. One-day and 1-y post-burn soils had the lowest similarity index, 0.05. Burning the slashed forest and conversion to cattle pasture depleted the original seed bank, replacing it by one dominated by pasture grasses.

scholarly journals Componentes fenológicos del sistema de cruzamiento monoico de Cnidoscolus spinosus (Euphorbiaceae) en Jalisco

2017 ◽  
pp. 1
Author(s):  
Stephen H. Bullock
Keyword(s):  
Deciduous Forest ◽  
Tropical Deciduous Forest ◽  
Western Mexico ◽  
Mature Period ◽  
Individual Trees ◽  
Female Flowers

A hierarchy of phenological features defines the opportunities for breeding in a population of Cnidoscolus spinosus in a tropical deciduous forest in western Mexico. On any one tree, inflorescences develop in rough synchrony and all present flowers of both sexes. Only female flowers develop at the lowest ranks of ramification but only males develop later. Overlap of the mature period of flowers of both sexes is uncommon on one inflorescence of between inflorescences : individual trees are functionally female or male at any moment. lnter-tree synchrony may thus reduce successful breeding. Asynchrony is achieved in part by differences in the onset of flowering, but also by variance in the lenght of individual flowering cycles. The occurrence of two or three cycles per tree during one season for the population increases its breeding opportunities.

Coyote Habitat Use in a Tropical Deciduous Forest of Western Mexico

2006 ◽  
Vol 70 (1) ◽  
pp. 216-221 ◽  
Author(s):  
MIRCEA G. HIDALGO-MIHART ◽  
LISETTE CANTÚ-SALAZAR ◽  
CARLOS A. LÓPEZ-GONZÁLEZ ◽  
PATRICIA G. MARTÍNEZ-GUTÍERREZ ◽  
ERIN C. FERNANDEZ ◽  
...  
Keyword(s):  
Habitat Use ◽  
Deciduous Forest ◽  
Tropical Deciduous Forest ◽  
Western Mexico

Seed bank and seed rain in a seasonal semi-deciduous forest in south-eastern Brazil

2002 ◽  
Vol 18 (5) ◽  
pp. 759-774 ◽  
Author(s):  
Maria Tereza Grombone-Guaratini ◽  
Ricardo Ribeiro Rodrigues
Keyword(s):  
Seed Bank ◽  
Rainy Season ◽  
Deciduous Forest ◽  
Similarity Index ◽  
Seed Rain ◽  
Seasonal Effects ◽  
South Eastern ◽  
Eastern Brazil ◽  
Annual Total ◽  
Dry Seasons

To examine the influence of seasonality on the abundance and composition of species in the community, we studied the seed rain and the seed bank in a seasonal, semi-deciduous forest in south-eastern Brazil. Soil samples (depth 3 cm, 0.25 m2) were collected within a 1-ha plot in the dry seasons of 1996 and 1997 and the rainy season of 1997 (84 samples per collection). Thirty-five seed traps (0.25 m2 each) were placed randomly in the forest from March 1997 to February 1998. The greatest density of seeds in the soil occurred in samples collected during the rainy season, the period which coincides with the main fruiting period in this forest. The Sørensen similarity index values for the seed bank composition among the three periods were high (> 0.50). The fallout of propagules was strongly seasonal, with more than half of the annual total number of seeds being caught in the two months around the end of the dry season and beginning of the rainy season. The mean density of seeds in the soil bank was nearly 86% lower than the seed rain density. There was no clear evidence of seasonal effects on species density and richness in this forest.

Daily activity patterns of coyotes (Canis latrans) in a tropical deciduous forest of western Mexico

2009 ◽  
Vol 44 (2) ◽  
pp. 77-82 ◽  
Author(s):  
Mircea G. Hidalgo-Mihart ◽  
Lisette Cantú-Salazar ◽  
Samia E. Carrillo-Percastegui ◽  
Carlos A. López-González
Keyword(s):  
Daily Activity ◽  
Deciduous Forest ◽  
Canis Latrans ◽  
Activity Patterns ◽  
Tropical Deciduous Forest ◽  
Western Mexico ◽  
Daily Activity Patterns

Dry Season Habitat Use by Lizards in a Tropical Deciduous Forest of Western Mexico

2002 ◽  
Vol 36 (3) ◽  
pp. 487-490 ◽  
Author(s):  
C. M. Gienger ◽  
Daniel D. Beck ◽  
Nathan C. Sabari ◽  
Della L. Stumbaugh
Keyword(s):  
Habitat Use ◽  
Deciduous Forest ◽  
Dry Season ◽  
Tropical Deciduous Forest ◽  
Western Mexico

scholarly journals Mammals from the Tarascan Plateau, Michoacán, México.

1999 ◽  
Vol 4 (1) ◽  
pp. 53 ◽  
Author(s):  
Constantino Orduña Trejo ◽  
Alondra Castro Campillo ◽  
José Ramírez Pulido
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Key Words ◽  
Deciduous Forest ◽  
First Record ◽  
The State ◽  
Rodent Species ◽  
Tropical Deciduous Forest ◽  
Oak Forest ◽  
Mountain Range

 Resumen: Se examinaron 568 ejemplares de mamíferos nativos de 49 especies, procedentes de 49 localidades de la Meseta Tarasca o Sierra Purépecha del Estado de Michoacán, México. Las especies encontradas en esta región del Eje Volcánico Transversal incluyen 1 marsupial, 2 insectívoros, 17 quirópteros, 2 carnívoros, 24 roedores y 1 lagomorfo. Para calcular la diversidad de especies en los cuatro hábitats muestreados, se utilizaron las 2 especies de insectívoros y 21 de roedores. De mayor a menor diversidad, en el bosque de pino-encino se recolectaron 201 individuos de 15 especies (H’ = 2.49), en el bosque tropical caducifolio 142 de 15 especies (H’ = 2.43), en el bosque de oyamel 92 individuos de 10 especies (H’ = 2.01) y en las áreas de ecotono 52 individuos de cuatro especies (H’ = 1.15). El registro de Hylonycteris underwoodi es el primero para las partes altas del Estado de Michoacán. Abstract: We examined 568 specimens of native mammals belonging to 47 species from 49 localities of the Tarascan Plateau or Sierra Purépecha mountain range in the State of Michoacán, México. Species composition of this enclave in the Transvolcanic Belt is 1 marsupial, 2 insectivores, 17 bats, 2 carnivores, 24 rodents, and 1 lagomorph. To calculate the species diversity according to the four sampled habitats, only the 2 insectivore and 21 rodent species were included. From higher to lower diversity values, we found 201 specimens from 15 species in pine-oak forest (H’ = 2.49), 142 from 15 species in tropical deciduous forest (H’ = 2.43), 92 specimens belonging to 10 species fir forest (H’ = 2.01), and 52 from four species in an ecotonal area (H’ =1.15). Hylonycteris underwoodi is the first record for the highlands from the State of Michoacan. Key words: Mammals, distribution, diversity, Tarascan Plateau, Michoacán.

scholarly journals Beta diversity of four braconid subfamilies (Braconidae, Agathidinae, Braconinae, Doryctinae and Macrocentrinae) of the Ria Lagartos Biosphere reserve in Yucatan, Mexico, with some considerations on biological habits

2018 ◽  
Vol 67 ◽  
pp. 63-83
Author(s):  
Roger Cauich-Kumul ◽  
Hugo Delfín-González ◽  
Abdiel Martín-Park ◽  
Pablo Manrique-Saide ◽  
Víctor López-Martínez
Keyword(s):  
Species Diversity ◽  
Beta Diversity ◽  
Deciduous Forest ◽  
Biosphere Reserve ◽  
Tropical Deciduous Forest ◽  
Dune Vegetation ◽  
Vegetation Communities ◽  
Abundance And Diversity ◽  
One Year ◽  
Malaise Traps

The species diversity composition and phenological behaviour of four braconid subfamilies (Hymenoptera: Braconidae: Agathidinae, Braconinae, Doryctinae and Macrocentrinae) were monitored in three vegetation communities (dune vegetation, tropical deciduous forest and savannah) of the Ria Lagartos Biosphere Reserve (RLBR) in Yucatan, Mexico. Braconid wasps were collected with Malaise traps every 15 days over one year (June 2008 to June 2009). A total of 2,476 specimens were inventoried comprising 233 species and 63 genera. The composition of braconids and their lifestyles differed among the three vegetation communities studied. Doryctinae was the most diverse and abundant subfamily in RLBR (40 genera, 145 species, 990 specimens) and the tropical deciduous forest recorded the maximum abundance and diversity (H’= 4.1; alpha value= 1.059), with 61 exclusive species. Phenological sequence indicates an influence of the rainy season in braconid diversity, but its effects differed among braconid subfamilies and among the vegetation communities. Finally, the importance of the RBRL as a conservation site for this hymenopterous wasp is discussed.

Abundance and diversity of soil arthropods in a tropical deciduous forest and mangrove forest of Kerala, India

ENTOMON ◽  
2020 ◽  
Vol 45 (1) ◽  
pp. 69-74
Author(s):  
Krishnapriya P D ◽  
Binoy C F
Keyword(s):  
Deciduous Forest ◽  
Monsoon Season ◽  
Winter Season ◽  
Similarity Index ◽  
Tropical Deciduous Forest ◽  
Soil Arthropods ◽  
Mangrove Habitat ◽  
Forest Habitat ◽  
Different Types ◽  
Abundance And Diversity

The abundance and diversity of soil arthropods in the Marottichal tropical deciduous forest and Kodungallur mangrove habitat of Thrissur District were studied. A total of 98 species belonging to 15 orders and 5 classes were obtained from the study area. Of these, 59 species belonging to 13 orders and 3 classes were recorded from forest habitat and 47 species belonging to 8 orders and 4 classes from mangroves. Order Coleoptera was the most abundant in both forest (30.69%) and mangrove (36.5%) habitats. Sorenson’s similarity index showed only 15.09% similarity among species indicating that both the habitats harboured significantly different types of species. It was noted that, as the humidity and moisture decreased, the abundance of species also decreased in both habitats. Temperature was negatively correlated with abundance of species. The diversity in forest habitat (4.03) was higher than mangrove habitat (3.77). Maximum abundance was recorded during monsoon season (June- August) and least during winter season (December- February). The species accumulation curve plotted for the study area indicated that there are more species likely to be discovered in both the habitats.

Distribution and annual net accumulation of above-ground dead phytomass and its influence on throughfall quality in a Mexican tropical deciduous forest ecosystem

2002 ◽  
Vol 18 (6) ◽  
pp. 821-834 ◽  
Author(s):  
J. Manuel Maass ◽  
Angelina Martínez-Yrízar ◽  
Cristina Patiño ◽  
José Sarukhán
Keyword(s):  
Dead Wood ◽  
Deciduous Forest ◽  
Elevation Gradient ◽  
Fine Fraction ◽  
Nutrient Flux ◽  
Tropical Deciduous Forest ◽  
Small Watershed ◽  
Western Mexico ◽  
Lower Plot ◽  
Standing Dead

The amount and annual net accumulation of above-ground dead woody material were quantified in a tropical deciduous forest in western Mexico. Three plots were located within a small watershed (16 ha) and distributed along a 150-m-elevation gradient (Upper, Middle and Lower plot). Total amount of above-ground dead phytomass (fine + coarse) was 27.2 Mg ha-1. Coarse dead category (branches + logs) made up 70.6% (19.2 Mg ha-1) of the total. The rest comprised the fine fraction, which was lying on the forest floor as surface litter. Of the total coarse dead woody mass, 70.8% was standing, hanging or still attached to live trees (13.6 Mg ha-1). Dead wood net accumulation was 6.6 Mg ha-1 y-1; 58% of this was coarse woody material and the rest comprised the fine litterfall fraction. The amount of standing, hanging/attached dead branches (2-20 cm circumference) varied significantly among plots, with the highest value in the Upper plot. Dead wood net accumulation was similar between the Upper and Middle plots, and significantly higher than the Lower plot. Compared to the intact canopy, the removal of dead mass (hanging/attached dead branches and standing dead logs) caused a significant decrease in throughfall nutrient concentration and nutrient flux by this pathway.

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