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Species richness of grasshoppers Orthoptera Acrididae on natural grasslands in relation with topography in the upper reaches of Heihe River, western China analysed with generalised additive; models GMs

, : Species richness of grasshoppers Orthoptera Acrididae on natural grasslands in relation with topography in the upper reaches of Heihe River, western China analysed with generalised additive; models GMs. Acta Entomologica Sinica 54.11 (November 20): 1312-1318

The environmental heterogeneity caused by topographical diversity is an important mechanism underlying the formation and maintenance of bio-geographic pattern of diversity distribution at the micro-scale, and the prerequisite for the difference in species richness. With the help of GIS and S-Plus, the GAM model was used to study topographic indexes influencing the distribution of grasshopper from July to August, and the relationship between the regional locust richness and terrain complexity was also studied based on the quantitative analysis of topographic variation characteristics of the upper reaches of the Heihe River on the northern slope of the Qilian Mountains. The results showed that in total 13 species ( including 3 149 individuals) belonging to 3 families and 10 genera were collected in 36 samples. The order that the richness of grasshopper was influenced by topographical factors was elevation > slope > aspect > profile > plane > position. Grasshopper distribution was almost balanced in the plane of curvature and the gradient profile curvature, and presented a two parabola distribution in elevation, slope and the whole position of slope gradient, showing a decreasing trend. On the regional distribution, there were higher richness of grasshoppers in the whole regions, but they were mainly located in the region with altitudes of 2 600 long dash 2 700 m, and mainly concentrated in the northwest and west slopes, which was consistent with actual observation. The relationship between grasshopper richness and terrain factors as well as the grasshopper distribution indicates that the redistribution of water and heat conditions due to topographical factors caused the diversification and fragmentation of grasshopper distribution patterns.


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Fish, J.G.; Jr.; Winkler, W.G.; Peacock, F.L., 1963: Diagnosis and management of salmonellosis in greyhounds. In 7 outbreaks of clinical salmonellosis in greyhounds, complete recoveries occurred after a few days of treatment with sulphadimethoxine by mouth, 12 mg./lb. (25 mg./kg.) 3 times a day then twice daily. Relapses after travel did not occur when a...

Lau, S.S.; Monks, T.J., 1988: The contribution of bromobenzene to our current understanding of chemically-induced toxicities. The metabolism and toxicity of bromobenzene has been investigated for well over one hundred years. The urinary excretion of mercapturic acids was first reported in 1879, in animals treated with bromobenzene. Bromobenzene has since proven to be a v...

Watkins J.; Slutsky R.; Tubau J.; Karliner J.S., 1981: Scintigraphic analysis of systolic pressure volume relations in response to changes in heart rate and afterload in normals and coronary patients. Clinical Research 29(2): 249A

Penson, J.; Azerad, M.A.; Puttemans, M.; Fassotte, C., 2001: Complementary observational study of the efficacy, tolerance and safety of lansoprazole 15 mg as maintenance therapy of reflux esophagitis in daily medical practice in Belgium (record RU49749/R002. Gastroesophageal reflux disease is a frequent illness with important implications on quality of life. In order to evaluate in a general population the efficacy and safety of lansoprazole 15 mg in maintenance therapy of reflux oesophagitis in curre...

Prescott, R.J.; Leonard, R.C., 1993: Pilot study and randomised trial of mitozantrone and ifosfamide for relapsed non-Hodgkin's lymphoma. Scotland and Newcastle Lymphoma group (SNLG) Working Party on Therapy. This report compares a pilot study followed by a trial of the combination of mitozantrone and ifosfamide for relapsed lymphoma. In the pilot study (15 patients) toxicity and activity of the combination was tested on a variety of relapsed non-Hodgk...

Anderson E.C., 1981: The role of wildlife in the epidemiology of foot and mouth disease in kenya. Karstad, L , B Nestel And M Graham (Ed ) Wildlife Disease Research And Economic Development; Proceedings Of A Workshop, Kabete, Kenya, Sept 8-9, 1980 80p International Development Research Center: Ottawa, Ont , Canada Illus Paper P16-18

Anonymous, 1986: The Netherlands dairy industry. This feature article on the Netherlands dairy industry describes the activities of the DMV-Campina Cooperative, which controls dairying in S. Netherlands with 14 factories manufacturing market milk, ice cream and desserts, condensed and concentrat...

Manganaro, A.; Pucci, L.; Ranazzi, L.; Salvati, L., 2001: Frogs as prey of tawny owls (Strix aluco) in central Italy. Pianura, 13: 279-281

Stephan, D.; Sbai, O.; Wen, J.; Couraud, P-Olivier.; Putterman, C.; Khrestchatisky, M.; Desplat-Jégo, S., 2013: TWEAK/Fn14 pathway modulates properties of a human microvascular endothelial cell model of blood brain barrier. The TNF ligand family member TWEAK exists as membrane and soluble forms and is involved in the regulation of various human inflammatory pathologies, through binding to its main receptor, Fn14. We have shown that the soluble form of TWEAK has a pro...

Theze J.; Germain R.; Kapp J.; Benacerraf B., 1978: Characterization and in vitro study of the activity of the suppression factor specific for the ter polymer l glutamic acid alanine l tyrosine. Annales d'Immunologie (Paris) 129C(1): 128