Hotspot analysis of Taiwanese breeding birds to determine gaps in the protected area network

Tsai Yu Wu, Bruno A. Walther, Yi Hsiu Chen, Ruey Shing Lin, Pei Fen Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Background: Although Taiwan is an important hotspot of avian endemism, efforts to use available distributional information for conservation analyses are so far incomplete. For the first time, we present a hotspot analysis of Taiwanese breeding birds with sufficient sampling coverage for distribution modeling. Furthermore, we improved previous modeling efforts by combining several of the most reliable modeling techniques to build an ensemble model for each species. These species maps were added together to generate hotspot maps using the following criteria: total species richness, endemic species richness, threatened species richness, and rare species richness. We then proceeded to use these hotspot maps to determine the 5% most species-rich grid cells (1) within the entire island of Taiwan and (2) within the entire island of Taiwan but outside of protected areas. Results: Almost all of the species richness and hotspot analyses revealed that mountainous regions of Taiwan hold most of Taiwan's avian biodiversity. The only substantial unprotected region which was consistently highlighted as an important avian hotspot is a large area of unprotected mountains in Taiwan's northeast (mountain regions around Nan-ao) which should become a high priority for future fieldwork and conservation efforts. In contrast, other unprotected areas of high conservation value were just spatial extensions of areas already protected in the central and southern mountains. To combine the results of our four hotspot criteria, we assessed which grid cells were the most valuable according to all four criteria. Again, we found the Nan-ao mountain regions to be important. We also showed that different hotspot criteria only partially overlapped and sometimes barely at all. Conclusions: Therefore, to protect areas based on only one hotspot criterion (total species richness) would not protect areas based on other hotspot criteria (endemic species richness, threatened species richness, or rare species richness) in Taiwan.

Original languageEnglish
Article number29
JournalZoological Studies
Volume52
Issue number1
DOIs
Publication statusPublished - 2013

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conservation areas
Taiwan
species diversity
birds
breeding
mountains
indigenous species
threatened species
cells
biodiversity

Keywords

  • Biodiversity
  • Conservation priorities
  • Distribution modeling
  • GIS
  • Hotspots

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Hotspot analysis of Taiwanese breeding birds to determine gaps in the protected area network. / Wu, Tsai Yu; Walther, Bruno A.; Chen, Yi Hsiu; Lin, Ruey Shing; Lee, Pei Fen.

In: Zoological Studies, Vol. 52, No. 1, 29, 2013.

Research output: Contribution to journalArticle

Wu, Tsai Yu ; Walther, Bruno A. ; Chen, Yi Hsiu ; Lin, Ruey Shing ; Lee, Pei Fen. / Hotspot analysis of Taiwanese breeding birds to determine gaps in the protected area network. In: Zoological Studies. 2013 ; Vol. 52, No. 1.
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AB - Background: Although Taiwan is an important hotspot of avian endemism, efforts to use available distributional information for conservation analyses are so far incomplete. For the first time, we present a hotspot analysis of Taiwanese breeding birds with sufficient sampling coverage for distribution modeling. Furthermore, we improved previous modeling efforts by combining several of the most reliable modeling techniques to build an ensemble model for each species. These species maps were added together to generate hotspot maps using the following criteria: total species richness, endemic species richness, threatened species richness, and rare species richness. We then proceeded to use these hotspot maps to determine the 5% most species-rich grid cells (1) within the entire island of Taiwan and (2) within the entire island of Taiwan but outside of protected areas. Results: Almost all of the species richness and hotspot analyses revealed that mountainous regions of Taiwan hold most of Taiwan's avian biodiversity. The only substantial unprotected region which was consistently highlighted as an important avian hotspot is a large area of unprotected mountains in Taiwan's northeast (mountain regions around Nan-ao) which should become a high priority for future fieldwork and conservation efforts. In contrast, other unprotected areas of high conservation value were just spatial extensions of areas already protected in the central and southern mountains. To combine the results of our four hotspot criteria, we assessed which grid cells were the most valuable according to all four criteria. Again, we found the Nan-ao mountain regions to be important. We also showed that different hotspot criteria only partially overlapped and sometimes barely at all. Conclusions: Therefore, to protect areas based on only one hotspot criterion (total species richness) would not protect areas based on other hotspot criteria (endemic species richness, threatened species richness, or rare species richness) in Taiwan.

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