Spatial and seasonal variation in the species richness and abundance of ferns and lycophytes in gallery forests of Cerrado in Central Brazil

2015 ◽  
Vol 39 (1) ◽  
pp. 315-326 ◽  
Author(s):  
Carlos Kreutz ◽  
Francisco de Paula Athayde Filho ◽  
Maryland Sanchez
Keyword(s):  
Species Richness ◽  
Seasonal Variation ◽  
Central Brazil ◽  
Spatial And Seasonal Variation ◽  
Gallery Forests ◽  
Species Richness And Abundance ◽  
Ferns And Lycophytes

scholarly journals Species richness and abundance of monogonont rotifers in relation to environmental factors in the UNESCO Sakaerat Biosphere Reserve, Thailand

2019 ◽  
Vol 11 (9) ◽  
pp. 14087-14100
Author(s):  
Nattaporn Plangklang ◽  
Chaichat Boonyanusith ◽  
Sujeephon Athibai
Keyword(s):  
Species Richness ◽  
Seasonal Variation ◽  
Aquatic Ecosystems ◽  
Physicochemical Parameters ◽  
Biosphere Reserve ◽  
Terrestrial Habitats ◽  
Monogonont Rotifers ◽  
Species Richness And Abundance ◽  
Total Species ◽  
Incomplete Picture

 The UNESCO Sakaerat Biosphere Reserve plays an important role in nature conservation and environmental protection.  Previous focus on terrestrial habitats and neglect of aquatic ecosystems has resulted in an incomplete picture of biodiversity of the area.  Based on the first investigation of planktonic diversity, rotifers were collected seasonally at five localities from September 2013 to May 2014 using a Schindler-Patalas plankton trap and a plankton net.  Fifteen families, 25 genera and 71 species of rotifers were identified.  The most diverse families were Lecanidae, Brachionidae, Lepadellidae, and Trichocercidae, accounting for 80% of the total species count.  The maximum species richness was reported at the reservoir, with 57 species (80% of the total), while the minimum species richness (34) was observed at the ponds.  The rainy season had the highest density, followed by winter and summer, with 149.15 N/l from an intermittent stream, and 95.43 and 50.68 N/l from a pond, respectively.  Most of the sampling sites at the three seasonal occasions were dominated by a planktonic species Polyarthra vulgaris.  The results indicate that the seasonal variation of the rotifer assemblage is related to the seasonal variation of physicochemical parameters. 

Seasonal variation in nocturnal calling activity of a savanna anuran community in central Brazil

1997 ◽  
Vol 18 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Glória Moreira ◽  
Larissa Barreto
Keyword(s):  
Species Richness ◽  
Seasonal Variation ◽  
Air Temperature ◽  
Reproductive Period ◽  
Climatic Conditions ◽  
Activity Period ◽  
Climatic Parameters ◽  
Central Brazil ◽  
Calling Activity ◽  
Permanent Pond

AbstractWe studied the calling activity of a savanna anuran assemblage and correlated two climatic parameters, rainfall and air temperature, with anuran calling. We made observations from September 1991 until March 1993 and quantified nocturnal calling activity by counting the number of calling males for each species present in a permanent pond. Bufo paracnemis had the shortest calling activity period and Physalaemus cuvieri had a seasonal calling period, lasting a maximum of four months. Diversity of calling males and species richness reached a peak in the first three months of the rainy season. Comparisons with other populations indicate that the reproductive period of P cuvieri varies along its geographical distribution in a manner related to regional climatic conditions.

scholarly journals Seasonal variation in species richness and abundance of waterbirds in Mole National Park, Ghana: Implication for conservation and ecotourism

Koedoe ◽  
2018 ◽  
Vol 60 (1) ◽  
Author(s):  
Timothy K. Aikins ◽  
Francis Gbogbo ◽  
Erasmus H. Owusu
Keyword(s):  
Species Richness ◽  
Seasonal Variation ◽  
National Park ◽  
Dry Season ◽  
Wet Season ◽  
Bird Abundance ◽  
Number Of Species ◽  
Waterbird Species ◽  
Significant Difference ◽  
Species Richness And Abundance

Mole National Park is the largest and the oldest national park in Ghana and an important bird area, yet its waterbird fauna is poorly documented because it is situated in the northern ecological zone far away from the coast of Ghana. Information on the seasonal variation in the park’s bird abundance and diversity is generally patchy but necessary for effective birdwatching planning and management of the park’s birds. Therefore, as a guide to potential ecotourists interested in waterbirds, this study described the seasonal variation in waterbird species diversity and abundance at Mole National Park. As waterbirds mostly congregate around open wetlands and their abundance is more appropriately determined by counting all individuals in the congregant, data were collected using the total area count of waterbirds from August 2015 to October 2015 (the wet season) and from December 2015 to February 2016 (the dry season). Secondary data on arrival of tourists in the park were also analysed. The park’s waterbird species richness was 29 in the dry season compared to 18 in the wet season. There was significant difference (p < 0.05) in the abundance of waterbirds in the dry season in which 4014 waterbirds were encountered compared to 646 in the wet season. The yearly tourist arrival data at Mole National Park shows an increasing trend with peak visitation period occurring during the wet season. The chances of tourists encountering more species and numbers of waterbirds in the park are higher in the dry season compared to the wet season.Conservation implications: Species richness and abundance of waterbirds in Mole National Park varied according to the wet and dry seasons with both the number of species and abundance higher in the dry season than the wet season. It is therefore indicative that most birdwatchers who visit the park in the wet season miss out on a number of species and numbers of waterbirds. To achieve effective birdwatching, management should schedule birdwatching activities to coincide with the dry season as the chances of encountering more species and numbers of waterbirds are higher.

Sign in / Sign up

Export Citation Format

Share Document