Chronosequential changes in species richness of forest-edge-dwelling butterflies during forest restoration after swidden cultivation in a humid tropical rainforest region in Borneo

2015 ◽  
Vol 20 (1) ◽  
pp. 125-134 ◽  
Author(s):  
Takao Itioka ◽  
Kohei Takenaka Takano ◽  
Keiko Kishimoto-Yamada ◽  
Taizo Tzuchiya ◽  
Yasuhiro Ohshima ◽  
...  
Keyword(s):  
Species Richness ◽  
Forest Restoration ◽  
Tropical Rainforest ◽  
Forest Edge ◽  
Swidden Cultivation

scholarly journals Dynamics and Edge Effect of an Atlantic Forest Fragment in Brazil

2016 ◽  
Vol 23 (3) ◽  
pp. 340-349 ◽  
Author(s):  
Poliana Gabriella Araújo Mendes ◽  
Maria Amanda Menezes Silva ◽  
Tassiane Novacosque Feitosa Guerra ◽  
Ana Carolina Borges Lins-e-Silva ◽  
Airton de Deus Cysneiros Cavalcanti ◽  
...  
Keyword(s):  
Species Richness ◽  
Atlantic Forest ◽  
Edge Effect ◽  
Woody Plants ◽  
Response Times ◽  
Forest Edge ◽  
Northeastern Brazil ◽  
Forest Fragment ◽  
Canopy Tree ◽  
Forest Interior

ABSTRACT The woody plants in an edge area formed approximately 35 years ago in an Atlantic Forest fragment in northeastern Brazil were examined, and three environments defined: edge, intermediate, and interior. Canopy tree densities and basal areas were found to be similar in all three environments, and also similar to previous published studies in the same region; species richness was greatest at the forest edge. The understory showed greater species richness in the forest interior, but greater diversity and equitability in the intermediate environment. Understory environments close to the forest edge demonstrated larger stem diameters than in the forest interior, although at lesser densities and with smaller total basal areas. Our results indicated the existence of distinct patterns in canopy and understory that most likely reflect differences in the response times of these two vegetation layers, with the understory being more sensitive to alterations in environmental structure.

Deer Browsing, Forest Edge Effects, and Vegetation Dynamics Following Bottomland Forest Restoration

2010 ◽  
Vol 18 (5) ◽  
pp. 702-710 ◽  
Author(s):  
Kenneth J. Ruzicka ◽  
John W. Groninger ◽  
James J. Zaczek
Keyword(s):  
Edge Effects ◽  
Vegetation Dynamics ◽  
Forest Restoration ◽  
Forest Edge ◽  
Deer Browsing ◽  
Bottomland Forest

Distance effect from cloud forest fragments on plant community structure in abandoned pastures in Veracruz, Mexico

2006 ◽  
Vol 22 (4) ◽  
pp. 431-440 ◽  
Author(s):  
Miguel Angel Muñiz-Castro ◽  
Guadalupe Williams-Linera ◽  
José María Rey Benayas
Keyword(s):  
Species Richness ◽  
Vegetation Structure ◽  
Forest Restoration ◽  
Cloud Forest ◽  
Distance Effect ◽  
Basal Area ◽  
Woody Species ◽  
Primary Forest ◽  
Forest Fragments ◽  
Forest Region

Secondary succession was studied in a Mexican cloud forest region along a chronosequence of 15 abandoned pastures (0.25–80 y). Our objective was to determine the effects of distance from the forest border on successional vegetation structure and woody species richness along the chronosequence. Vegetation structure similar to that of mature forests recovered over 40–50 y, both close to (0–10 m) and away from (40–50 m) the border. Total woody species richness was similar for both distances but species composition differed significantly. When primary forest species were analysed separately, basal area, height, abundance and richness were all significantly higher close to the forest border. Primary species such as Quercus spp. (barochorous-synzoochorous) and Carpinus caroliniana (anemochorous) had lower basal area, density and height away from the border than close to it. Secondary species such as Lippia myriocephala (anemochorous) and Myrsine coriacea (endozoochorous) did not differ in their rate of colonization between distances. The limitation of seed dispersal and establishment for primary woody species away from forest borders suggests that propagules need to be introduced to accelerate forest restoration.

scholarly journals Species richness, distribution and genetic diversity of Caenorhabditis nematodes in a remote tropical rainforest

2013 ◽  
Vol 13 (1) ◽  
pp. 10 ◽  
Author(s):  
Marie-Anne Félix ◽  
Richard Jovelin ◽  
Céline Ferrari ◽  
Shery Han ◽  
Young Ran Cho ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Species Richness ◽  
Tropical Rainforest

Importance of shade trees (Grevillea robusta) in the dispersal of forest tree species in managed tea plantations of southern Western Ghats, India

2012 ◽  
Vol 28 (2) ◽  
pp. 187-197 ◽  
Author(s):  
H. C. Chetana ◽  
T. Ganesh
Keyword(s):  
Species Richness ◽  
Forest Tree ◽  
Forest Edge ◽  
Shade Trees ◽  
Grevillea Robusta ◽  
Ecological Processes ◽  
Species Dominance ◽  
Shade Tree ◽  
Tea Plantations ◽  
Southern Western Ghats

Abstract:Abandoned plantations of coffee, tea and other commercial crops offer opportunities for understanding ecological processes in modified forest ecosystems. Unlike tree plantations tea is maintained as a shrub with a continuous dense short canopy that precludes large-frugivore activity thereby limiting dispersal of forest species to such areas. In this study we determine how location and density of Grevillea robusta a shade tree in tea plantations and proximity of plantations to forests influences seed arrival from forests into the plantations. We also estimate the importance of dispersal modes in the colonization processes. We laid 10 × 10-m plots at three distance intervals from the forest edge in three different plantation types with varying shade tree densities. Within the plots we laid four 1× 1-m subplots at the corners of the plot. We estimated species richness, abundance and categorized the seeds into dispersal modes in these plots. Grevillea robusta increased species richness of seeds by three times and abundance of seeds by 3–30 times compared with plantations without them. Higher density of G. robusta increased seed input changed species composition and altered species dominance in the plantations. Distance to forests influenced seed arrival in plantations without G. robusta trees and plots 95 m from the forest did not have any seeds in them. No such effect was seen in plantations with G. robusta trees. Seeds dispersed by birds or a combination of birds and mammals contribute 30% of the seeds reaching the plantations with G. robusta and this was not influenced by distance from the forest. In plantations without G. robusta bird dispersal is restricted to 25 m from the forest edge. In general density of shade trees has a strong influence on seed arrival which can negate the forest proximity effect and enhance natural forest colonization.

scholarly journals More individuals but fewer species: testing the ‘more individuals hypothesis’ in a diverse tropical fauna

2010 ◽  
Vol 6 (4) ◽  
pp. 490-493 ◽  
Author(s):  
Terrence P. McGlynn ◽  
Michael D. Weiser ◽  
Robert R. Dunn
Keyword(s):  
Species Richness ◽  
Primary Productivity ◽  
Large Scale ◽  
Positive Relationship ◽  
Tropical Rainforest ◽  
Net Primary Productivity ◽  
Resource Abundance ◽  
Monotonic Increase ◽  
Ant Diversity ◽  
Unimodal Relationship

A positive relationship between species richness and productivity is often observed in nature, but the causes remain contentious. One mechanism, the ‘more individuals hypothesis’ (MIH), predicts richness increases monotonically with density, as a function of resource flux. To test the MIH, we manipulated resource abundance in a community of tropical rainforest litter ants and measured richness and density responses. A unimodal relationship between richness and density most closely fitted the control and disturbance (resource removal) treatments in contrast to expectations of the MIH. Resource addition resulted in a monotonic increase in richness relative to density, a shift from the pattern in the control. In the disturbance treatment, richness was greater than in the control, opposite to expectations of the MIH. While large-scale correlations between ant diversity and net primary productivity or temperature are reconcilable with the MIH, key elements of the hypothesis are not supported.

scholarly journals Exotic earthworm (Oligochaeta: Lumbricidae) assemblages on a landscape scale in central Canadian woodlands: importance of region and vegetation type

2017 ◽  
Vol 47 (7) ◽  
pp. 935-945 ◽  
Author(s):  
Amy Choi ◽  
Tara E. Sackett ◽  
Sandy M. Smith ◽  
M. Isabel Bellocq
Keyword(s):  
Species Richness ◽  
Forest Restoration ◽  
Vegetation Type ◽  
Mixed Forest ◽  
Habitat Type ◽  
Soil Characteristics ◽  
Landscape Scale ◽  
Assemblage Composition ◽  
Earthworm Species ◽  
South Central

A growing understanding about the impacts of earthworms (Oligochaeta: Lumbricidae) on ecosystem processes and forest restoration necessitates an examination of their role in Canadian forests where they have become invasive. Little is known about the landscape-scale responses of earthworm populations to different regional characteristics and vegetation types within Canada’s central woodlands. We examined the regional variation of earthworm species richness, biomass, and assemblage composition across a range of four municipal regions (from south to north: Halton, Wellington, York, and Simcoe) and four habitat types (deciduous forest, mixed forest, tree plantation, and meadow) with varying soil characteristics in woodlands of south-central Ontario, Canada. In general, earthworm communities differed by region but not by habitat type. The most southern regions supported the highest earthworm species richness, biomass (i.e., Lumbricus and Octolasion), and density, and this was associated with a south–north gradient in soil characteristics. Assemblage composition differed by region but not by habitat type. The observed south–north gradient suggests an underlying effect of invasion spread associated with human settlement and density. Our results provide baseline information about earthworm communities in south-central Ontario forests and will enable managers to plan for the increasing role of earthworms in Canada’s future forests.

scholarly journals Bats (Mammalia: Chiroptera) from a remnant of Atlantic Forest in Pernambuco, northeastern Brazil

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Fabio Angelo Melo Soares ◽  
Carlos Eduardo Borges Pinto Ribeiro ◽  
Marcela Regina de Melo Daher ◽  
Deoclécio de Queiroz Guerra ◽  
Stephen Ferrari
Keyword(s):  
Species Richness ◽  
Atlantic Forest ◽  
Forest Edge ◽  
The State ◽  
Northeastern Brazil ◽  
Stepping Stone ◽  
Total Species Richness ◽  
The Family ◽  
Total Species

The RPPN Carnijó (08° 07’ 07” S, 35° 05’ 32” N) is a 25 hectare fragment of Atlantic Forest located in the municipality of Moreno, Pernambuco. Bats were sampled at this site during a total of 19 months between 2006 and 2008. Four mist-nets were set for six hours each night along trails, the forest edge, natural clearings, and over watercourses, while roosts were located during daytime searches. A total of 518 specimens were captured during 43 nights, representing 20 species in 16 genera. Total species richness was estimated to be 25.7 ± 2.0, and diversity was H’ = 2.07. The family Phyllostomidae predominated, with 98% (N = 509) of the specimens captured. The species recorded represent 28% of the known chiropteran fauna of the state of Pernambuco. The results indicate that the reserve may play a fundamentally important role in the maintenance of local biodiversity by acting as a “stepping stone” linking the larger fragments within the local landscape.

Local environmental context determines the colonisation of leaf shelters by arthropods: an experimental study

2022 ◽  
pp. 1-9
Author(s):  
Samuel Novais ◽  
Vicente Hernández-Ortiz ◽  
Karla Rodríguez-Hernández ◽  
Mauricio Quesada ◽  
G. Wilson Fernandes ◽  
...  
Keyword(s):  
Tropical Rainforest ◽  
Local Environment ◽  
Forest Edge ◽  
Environmental Context ◽  
Limited Resources ◽  
Arthropod Species ◽  
Living Fences ◽  
Species Richness And Abundance ◽  
Living Fence ◽  
Arthropod Abundance

Abstract The magnitude of facilitation by shelter-building engineers on community structure is expected to be greater when they increase limited resources in the environment. We evaluated the influence of local environmental context on the colonisation of leaf shelters by arthropods in a Mexican evergreen tropical rainforest. We compared the species richness and abundance of arthropods (total and for different guilds) colonising artificially rolled leaves in habitats differing in understory heterogeneity (forest edge > old-growth forests > living fences). Arthropod abundance of the most representative arthropod taxa (i.e., Araneae, Blattodea, Collembola and Psocoptera) colonising the rolled leaves was greater at forest edge, a trend also observed for average arthropod abundance, and for detritivore and predator guilds. In addition, fewer arthropod species and individuals colonised the rolled leaves in the living fence habitat, a trend also observed for most arthropod guilds. As forest edge is expected to have a greater arthropod diversity and stronger density-dependent interactions, a greater limitation of refuges from competitors or predators may have determined the higher colonisation of the rolled leaves in this habitat. Our results demonstrate that local environment context is an important factor that affects the colonisation of arthropods in leaf shelters.

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