Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates

Simple item page
dc.contributor.advisorCrowe, Timothy Men_ZA
dc.contributor.authorKoen, Julius Heinrichen_ZA
dc.date.accessioned2016-05-09T09:02:40Z
dc.date.available2016-05-09T09:02:40Z
dc.date.issued1985en_ZA
dc.description.abstractSome silvicultural practices in the Knysna Forest are aimed at the sustained-yield production of valuable timber tree species, albeit on limited areas only. This study investigates effects of forest plant species composition and physiognomy on bird and invertebrate communities in three discrete, relatively undisturbed forest types along a dry-wet soil moisture gradient. Using discriminant functions analysis, a 100% floristic and a 78% vegetation structural discrimination was obtained between the three forest types. However, the bird communities of these floristically and structurally different forest types were very similar in species composition and had much lower densities than normally encountered in other superficially similar forests. It was only possible to discriminate between the wet and the moist/dry forest types by using the two best bird discriminators. the blackheaded oriole (Oriolus larvatus) and the sombre bulbul (Andropadus importunus). A separation of the moist and dry forest types was not possible. Although an 81% discrimination between forest types was attained through analysis of ground surface invertebrates. measures of litter and aerial invertebrate abundance were of limited use as discriminators. Historical and biogeographic factors and the low nutritional levels in the soil and vegetation may be the cause of low bird and invertebrate density and diversity. It is concluded therefore, that floristics and vegetation structure have, at best, a minor influence on bird community structure, and possibly also on the invertebrate community in the Knysna Forest and that management practices need not cater for variation in forest vegetation composition and physiognomy. Bibliography: pages 49-59.en_ZA
dc.identifier.apacitationKoen, J. H. (1985). <i>Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/19521en_ZA
dc.identifier.chicagocitationKoen, Julius Heinrich. <i>"Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1985. http://hdl.handle.net/11427/19521en_ZA
dc.identifier.citationKoen, J. 1985. Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Koen, Julius Heinrich AB - Some silvicultural practices in the Knysna Forest are aimed at the sustained-yield production of valuable timber tree species, albeit on limited areas only. This study investigates effects of forest plant species composition and physiognomy on bird and invertebrate communities in three discrete, relatively undisturbed forest types along a dry-wet soil moisture gradient. Using discriminant functions analysis, a 100% floristic and a 78% vegetation structural discrimination was obtained between the three forest types. However, the bird communities of these floristically and structurally different forest types were very similar in species composition and had much lower densities than normally encountered in other superficially similar forests. It was only possible to discriminate between the wet and the moist/dry forest types by using the two best bird discriminators. the blackheaded oriole (Oriolus larvatus) and the sombre bulbul (Andropadus importunus). A separation of the moist and dry forest types was not possible. Although an 81% discrimination between forest types was attained through analysis of ground surface invertebrates. measures of litter and aerial invertebrate abundance were of limited use as discriminators. Historical and biogeographic factors and the low nutritional levels in the soil and vegetation may be the cause of low bird and invertebrate density and diversity. It is concluded therefore, that floristics and vegetation structure have, at best, a minor influence on bird community structure, and possibly also on the invertebrate community in the Knysna Forest and that management practices need not cater for variation in forest vegetation composition and physiognomy. Bibliography: pages 49-59. DA - 1985 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1985 T1 - Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates TI - Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates UR - http://hdl.handle.net/11427/19521 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19521
dc.identifier.vancouvercitationKoen JH. Animal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebrates. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1985 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19521en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZoologyen_ZA
dc.titleAnimal-habitat relationships in the Knysna forest : discrimination between forest types by birds and invertebratesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1985_koen_julius_heinrich.pdf
Size:
2.43 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters