Impacts of agricultural land use on stream benthic macroinvertebrates in tributaries of the Mekong River, northeast Thailand.
Journal Title: Advances in Environmental Sciences - International Journal of the Bioflux Society - Year 2010, Vol 2, Issue 2
Abstract
Ecological impacts of non-intensive agricultural activities on stream community, especially in headwater streams adjacent to conserved areas, are poorly known in Thailand. We investigated the impacts of non-intensive agricultural activities on stream habitat characteristics and benthic macroinvertebrate community in the headwater streams, tributaries of the Mekong River, northeast Thailand. We compared the streams running through forests in National Parks and Wildlife Sanctuaries and those through agricultural areas. Twenty kick samples of benthic macroinvertebrates were collected using a D-frame dipnet (0.3 m wide, 450 µm mesh size) from each sampling site. Sixteen physicochemical parameters of stream characteristics were measured. The results suggested that this disturbance had an impact on stream habitats more than its community. Agricultural land use altered the streams to be wider, deeper, and more discharged with less percentage of riparian coverage and high water temperature. Benthic macroinvertebrate composition did not differ in both areas, but intolerant benthic fauna decreased, while tolerant taxa were predominant and more abundant in the agricultural areas. In this study, water velocity and water temperature are the major important variables related to the distribution of benthic macroinvertebrates.
Authors and Affiliations
Paiboon Getwongsa, Chutima Hanjavanit, Narumon Sangpradub
Keywords
Related Articles
- EP ID EP155286
- DOI -
- Views 65
- Downloads 0
Diversity and distribution of fishes of Gaji River, Bauchi State, Nigeria
Fish sampling was conducted along the Gaji River with a view to assessing the Diversity and Distribution of the fishes. The river which is the major source of water for the diverse wild fauna in and around the Yanka...
Solar photocatalitic degradation of Vat Yellow 4 dye in aqueous suspension of TiO[sub]2[/sub] - optimization of operational parameters.
The photocatalytic decolourisation and degradation of an anthraquinone dye Vat Yellow 4 in aqueous solution with TiO[sub]2[/sub]-P25 (Degussa) as photocatalyst in slurry form has been investigated under solar irradiation...
Influence of short- and long-term exposition to Roundup on the spontaneous and hormonally stimulated LH secretion and gills condition in Prussian carp (Carassius gibelio)
Roundup is the most extensively used herbicide in world agriculture. In the present study we examined the influence of Roundup at the concentration of 15 mg L-1on luteinizing hormone (LH) secretion and reproduction of Pr...
Strategic elements for an evaluation of extreme events risk
Extreme events, especially those generated by climate change, have been scientifically approached for a better understanding of their causes as well as for finding efficient ways in which potential damages be diminished...
Using maximum entropy to predict the distribution of a critically endangered reptile species (Eryx jaculus, Reptilia: Boidae) at its Northern range limit
The sand boa ([i]Eryx jaculus[/i]) is one of the least known and rarest reptile species in Europe. In Romania, the sand boa is the rarest reptile species with only four locality records being known; at Cernavodă, Cărpini...