Factors limiting kererū (Hemiphaga novaeseelandiae) populations across New Zealand
نویسندگان
چکیده
Kererū declined rapidly following European settlement in New Zealand, and they remain at a reduced density. We assessed three sources of information to test the hypothesis that predation by introduced mammals abundance food resources are two major factors determining kererū across Zealand. First, we reviewed literature on affecting vital rates kererū. This analysis showed is cause most nest failures deaths Second, examined data from database bird sanctuary outcomes Zealand evaluate long-term responses intensive pest control local scales. detections did not always increase predator control, which suggests supply or forest area may be more important limiting some sanctuaries. Third, understand underlying temporal spatial distribution patterns national scale, changes occupancy through time using 1969–1979 1999–2004 editions Atlas Bird Distribution Specifically, asked (1) whether there have been declines between Atlases, (2) how relate indigenous cover, temperature, urbanisation, type (podocarp beech dominated). remained stable North Island periods but South Island. Across both islands periods, decreased significantly as cover decreased, availability still factor parts Overall, our results support previous studies showing primary for forests, also highlight importance recovery.
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ژورنال
عنوان ژورنال: New Zealand Journal of Ecology
سال: 2021
ISSN: ['1177-7788', '0110-6465']
DOI: https://doi.org/10.20417/nzjecol.45.30