NDLI: Land use factors determining occurrence of Red-necked Spurfowl (Pternistis afer) in the Drakensberg Midlands, South Africa

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Land use factors determining occurrence of Red-necked Spurfowl (Pternistis afer) in the Drakensberg Midlands, South Africa

Content Provider	Springer Nature Link
Author	Ramesh, Tharmalingam Downs, Colleen T.
Copyright Year	2013
Abstract	Conservation of forest associated birds depends on appropriate prediction of habitat change effects on their distribution patterns. We investigated a variety of land use gradients in an attempt to determine which factors influence site occupancy and detection of Red-necked Spurfowl (Pternistis afer) on farmland in the Drakensberg Midlands, South Africa. We used presence/absence data from 44 camera traps to estimate proportion of area occupied by the study species during October 2012–January 2013. Average occupancy rate of Red-necked Spurfowl was 0.42 ± 0.10 with a low detection probability 0.29 ± 0.04. Commercial forestry plantation influenced their presence positively while the index of human abundance negatively influenced the proportion of area occupied. Model selection indicated that cropland cultivation area had a strong negative effect on the detection probability of Red-necked Spurfowl while availability of indigenous forest patch and natural grassland influenced their detection positively. In the absence less presence of natural forest, commercial plantation forestry might have provided the next best possible habitat for this forest associated species where indigenous forest patches covering a small part of the landscape have extensively fragmented. These findings detailed the influence of land use variables as fragmentation and conversion of indigenous forest and grassland ecosystems into agricultural and human dominated areas affect the distribution of species that are highly selective towards forested habitats. Wie verschiedene Arten der Landnutzung das Vorkommen von Rotkehlfrankolinen ( Pternistis afer ) im Mittelland der Drakensberge in Südafrika beeinflussen Die Erhaltung waldlebender Vögel beruht auf einer realistischen Einschätzung davon, wie Veränderungen im Lebensraum die Verteilung der Arten beeinflusst. Wir untersuchten verschiedene Formen der Landnutzung, um festzustellen, wie sie das Vorkommen und die Entdeckungsrate von Rotkehlfrankolinen (Pternistis afer) auf landwirtschaftlichen Nutzflächen im Mittelland der Drakensberge in Südafrika beeinflussten. Anhand von Anwesenheitsdaten aus 44 Kamerafallen erfassten wir das Gebiet, das unsere Studienart zwischen Oktober 2012 und Januar 2013 nutzte. Durchschnittliche Aufenthaltswahrscheinlichkeit der Rotkehlfrankoline war 0.42 ± 0.10, wobei die Entdeckungsrate mit 0.29 ± 0.04 gering war. Kommerzielle Forstwirtschaft beeinflusste das Vorkommen der Zielart positiv, während die Anwesenheit von Menschen sich negativ auf ihre Gebietsausdehnung auswirkte. Landwirtschaftlich genutzte Flächen hatten einen stark negativen Einfluss auf die Entdeckungsrate der Rotkehlfrankoline, während Waldgebiete mit einheimischen Pflanzen und naturbelassene Wiesen ihre Entdeckung wahrscheinlicher machten. Da ursprüngliche Waldgebiete auf sehr kleine und verstreute Landstücke reduziert wurden, scheinen gewerblich genutzte Waldflächen das nächstbeste Habitat für diese waldlebende Art darzustellen. Diese Ergebnisse verdeutlichen den Einfluss der Habitatfragmentierung und Umwandlung von ursprünglichen Wäldern und Wiesen in landwirtschaftlich genutzte und von Menschen dominierte Gebiete auf die Verteilung von Arten, die sehr an Waldgebiete gebunden sind.
Starting Page	471
Ending Page	480
Page Count	10
File Format	PDF
ISSN	21937192
Journal	Journal für Ornithologie
Volume Number	155
Issue Number	2
e-ISSN	21937206
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-12-04
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Camera trapping Detection probability Drakensberg midlands Land use Occupancy Spurfowl Zoology Animal Ecology Evolutionary Biology
Content Type	Text
Resource Type	Article

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