The effects of forest fragmentation on species richness on the Obudu Plateau, south-eastern Nigeria

2012 ◽  
Vol 51 (1) ◽  
pp. 32-36 ◽  
Author(s):  
Filibus Danjuma Dami ◽  
Georgina Samuel Mwansat ◽  
Shiiwa A. Manu
Keyword(s):  
Species Richness ◽  
Forest Fragmentation ◽  
South Eastern

Species richness, distribution pattern, and conservation status of amphibians in Cross River National Park, south‐eastern Nigeria

Biologia ◽  
2021 ◽  
Author(s):  
Lotanna Micah Nneji ◽  
Adeniyi C. Adeola ◽  
Babatunde E. Adedeji ◽  
Omotoso Olatunde ◽  
Abiodun B. Onadeko ◽  
...  
Keyword(s):  
Species Richness ◽  
Distribution Pattern ◽  
National Park ◽  
Conservation Status ◽  
Cross River ◽  
South Eastern

Forest fragmentation modulates effects of tree species richness and composition on ecosystem multifunctionality

Ecology ◽  
2019 ◽  
Vol 100 (4) ◽  
pp. e02653 ◽  
Author(s):  
Lionel R. Hertzog ◽  
Roschong Boonyarittichaikij ◽  
Daan Dekeukeleire ◽  
Stefanie R. E. de Groote ◽  
Irene M. van Schrojenstein Lantman ◽  
...  
Keyword(s):  
Species Richness ◽  
Forest Fragmentation ◽  
Tree Species ◽  
Tree Species Richness ◽  
Ecosystem Multifunctionality

Infaunal benthic community structure and function in the Gulf of Carpentaria, northern Australia

1994 ◽  
Vol 45 (3) ◽  
pp. 293 ◽  
Author(s):  
BG Long ◽  
IR Poiner
Keyword(s):  
Species Richness ◽  
Species Density ◽  
Physical Factors ◽  
Suspension Feeding ◽  
Sediment Texture ◽  
Surface Deposit ◽  
Feeding Mode ◽  
Sediment Grain Size ◽  
South Eastern ◽  
Deposit Feeders

The infaunal benthos (>20 m) of the Gulf of Carpentaria was surveyed during November and December 1990. In all, 684 taxa were collected from 105 stations, each with three replicate 0.1-m2 grab samples (Smith-McIntyre grab). Trends in abundance and species richness were correlated with gulf-wide trends in sediment texture and depth. Highest abundance (20-153 individuals per 0.1 m2), wet-weight biomass (X=7.6 g per 0.1 m2) and species density (X=25.8 taxa per 0.1 m2) occurred in the sands and muddy sands along the eastern and south-eastern margins of the gulf. Lowest abundance (3.3-20.0 individuals per 0.1 m2), biomass (X=3.0 g per 0.1 m2) and species density (X=9.5 taxa per 0.1 m2) occurred in the muds and sandy muds in the centra, western and north-western gulf. Infaunal abundance and biomass were similar to those of other tropical continental shelves but were lower than those of some temperate-region shelves and upwelling areas. Species richness was also lower than in temperate areas of upwelling or high production. Scavengers/carnivores (44%) and deposit feeders (43%) numerically dominated throughout the gulf. Suspension feeding was less prevalent (13%), and few herbivores were found (< 1%). There was a trend in the proportion of deposit and suspension feeders that was related to sediment texture. Suspension feeding was highest in the muddy sands of the eastern and south-eastern gulf and lowest in the muds of the north-west. The proportion of deposit feeders was highest in muddy sediments and lowest in sandy sediments. Small (<5 mm) surface deposit feeders numerically dominated within this feeding mode. The 15 numerically dominant taxa were comprised mainly of opportunistic or second-stage colonizing taxa. Most had gulf-wide distribution patterns, but levels of abundance were correlated with sediment and depth. The infaunal benthic communities in the Gulf of Carpentaria appear to be regulated by physical factors of the environment that correlate with sediment grain size and depth.

Composition and structure of Orthopteran faunas in cereal crops in Ethiopia

1992 ◽  
Vol 82 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Tibebu Habtewold ◽  
Jan Landin
Keyword(s):  
Species Richness ◽  
Rare Species ◽  
Common Species ◽  
Black Soil ◽  
Cereal Crops ◽  
South Eastern ◽  
Light Soil ◽  
Composition And Structure

AbstractAdult grasshopper (Orthoptera: Acridoidea, Tetrigioidea Tettigonioidea) assemblages were sampled at four localities in south-eastern Shoa, around Debre Zeit, Ethiopia, between August 1986 and September 1988. Three localities were followed for the whole period but the fourth locality was followed only between August 1986 and July 1987. Samples were taken fortnightly from both black and light soil fields of tef and wheat crops, each in three replicates. The fauna consisted of twenty-nine taxa of both short- and longhorned grasshoppers, twenty-six of which are identified to species. Over 70% of the species belong to Acrididae and most of them are either pests or potential pests of cereal crops. Species richness, diversity and dominance within and between sites and seasons did not differ much during the two year period. The composition and structure of the assemblage was relatively constant. Despite fluctuation in abundance, dominant and common species remained common and rare species rare. Aiolopus longicornis Sjöstedt was most dominant. Some species are more abundant on black soil than on light soil and vice versa. The results are compared to grasshopper assemblages studied elsewhere.

scholarly journals Effects of forest fragmentation on dipterofauna (Calliphoridae) at the Reserva Biológica do Tinguá, Nova Iguaçu, RJ

2010 ◽  
Vol 70 (1) ◽  
pp. 55-63 ◽  
Author(s):  
ACP. Ferraz ◽  
BQ. Gadelha ◽  
MMC. Queiroz ◽  
GE. Moya-Borja ◽  
VM. Aguiar-Coelho
Keyword(s):  
Species Richness ◽  
Forest Fragmentation ◽  
Atlantic Forest ◽  
Edge Effects ◽  
Canopy Openness ◽  
Forest Interior

Samples were collected every month in three different sites of the Reserva Biológica do Tinguá, Brazil: site A was located on the border of the forest and sites B and C were located 1,000 and 500 m, respectively, towards the forest interior. The objective was to determine edge effects on a fragment of the Atlantic Forest. The greatest species richness was observed in sites A and B (23 species), compared with site C (16 species). Site A showed the greatest abundance and constancy, independent of the degree of synanthropy. Asynanthropic species were more abundant and constant in sites B and C. Site B showed the greatest diversity; and sites A and B showed the greatest similarity of populations. There was no significant correlation between Calliphoridae richness and canopy openness except in site C. Richness and abundance were positively correlated with subwood density, except for richness in site B.

Comparative Evaluation of the Species Richness and Diversity of Three Parallel Forest Ecosystems in South-Eastern Nigeria

2016 ◽  
Vol 8 (4) ◽  
pp. 1-12
Author(s):  
Nkumah Okereke ◽  
Ebenezer Mbaekwe ◽  
Peter Nnabude ◽  
Kenneth Ekwealor ◽  
Godwin Nwonumara ◽  
...  
Keyword(s):  
Species Richness ◽  
Comparative Evaluation ◽  
Forest Ecosystems ◽  
South Eastern ◽  
Species Richness And Diversity
Sign in / Sign up

Export Citation Format

Share Document