Sin Chen, Meng-Hsien Chuang, Hau-Jie Shiu, Jian-Nan Liu
{"title":"量化农业景观中土地覆盖变化对濒危农田绿树蛙(Zhangixalus arvalis)的影响:对保护工作的启示。","authors":"Sin Chen, Meng-Hsien Chuang, Hau-Jie Shiu, Jian-Nan Liu","doi":"10.6620/ZS.2021.60-71","DOIUrl":null,"url":null,"abstract":"<p><p>Habitat loss and fragmentation have a significant negative effect on amphibian species, particularly those with specialized habitat requirements. The endangered farmland green treefrog (<i>Zhangixalus arvalis</i>) primarily inhabits woodlands of agricultural landscapes in central Taiwan. Recently, due to increased demands for pineapple products, many woodlands, particularly bamboo plantations, were converted to pineapple fields. This study aimed to quantify the effect of habitat loss and fragmentation on <i>Z. arvalis</i> due to changes in land cover in an agricultural landscape. The study area contained 34,243 50 m × 50 m grids. In 2006 and 2014-2015, we used acoustic surveys to survey the occurrence of <i>Z. arvalis</i> in each grid. We obtained satellite images of the study area for 2006 and 2014, and we assigned the land-cover type of each grid to one of the following six types: woodland, brushland, cropland, bareland, manmade structures and water body. We examined whether <i>Z. arvalis</i> preferred a certain land-cover type by comparing the proportion of cover types available and the proportion of cover types used by the frogs. Furthermore, we used occurrence records for 2006 and 2014-2015 and applied the Maximum Entropy Model to predict suitable habitat for the respective years. We mapped the loss of suitable habitat and used six indices to quantify habitat fragmentation within the 8 years. We also tested the prediction that the occupancy rate of <i>Z. arvalis</i> in different-sized habitat patches was a function of patch size. <i>Zhangixalus arvalis</i> exhibited a strong preference for woodland, but avoided cropland and manmade structures. From 2006 to 2014-2015, the suitable habitat decreased 4.1%, and all six indices showed an increase in habitat fragmentation. The occupancy rate of different-sized woodland patches was positively correlated with patch size. Mapping suitable habitat and identifying the potential gaps in functional habitat connectivity can be used to guide effective measures for conserving <i>Z. arvalis</i>.</p>","PeriodicalId":43064,"journal":{"name":"Egyptian Pediatric Association Gazette","volume":"65 1","pages":"e71"},"PeriodicalIF":0.5000,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9121362/pdf/","citationCount":"0","resultStr":"{\"title\":\"Quantifying the Effect of Land-cover Change on the Endangered Farmland Green Treefrog (<i>Zhangixalus arvalis</i>) in an Agricultural Landscape: Implications for Conservation.\",\"authors\":\"Sin Chen, Meng-Hsien Chuang, Hau-Jie Shiu, Jian-Nan Liu\",\"doi\":\"10.6620/ZS.2021.60-71\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Habitat loss and fragmentation have a significant negative effect on amphibian species, particularly those with specialized habitat requirements. The endangered farmland green treefrog (<i>Zhangixalus arvalis</i>) primarily inhabits woodlands of agricultural landscapes in central Taiwan. Recently, due to increased demands for pineapple products, many woodlands, particularly bamboo plantations, were converted to pineapple fields. This study aimed to quantify the effect of habitat loss and fragmentation on <i>Z. arvalis</i> due to changes in land cover in an agricultural landscape. The study area contained 34,243 50 m × 50 m grids. In 2006 and 2014-2015, we used acoustic surveys to survey the occurrence of <i>Z. arvalis</i> in each grid. We obtained satellite images of the study area for 2006 and 2014, and we assigned the land-cover type of each grid to one of the following six types: woodland, brushland, cropland, bareland, manmade structures and water body. We examined whether <i>Z. arvalis</i> preferred a certain land-cover type by comparing the proportion of cover types available and the proportion of cover types used by the frogs. Furthermore, we used occurrence records for 2006 and 2014-2015 and applied the Maximum Entropy Model to predict suitable habitat for the respective years. We mapped the loss of suitable habitat and used six indices to quantify habitat fragmentation within the 8 years. We also tested the prediction that the occupancy rate of <i>Z. arvalis</i> in different-sized habitat patches was a function of patch size. <i>Zhangixalus arvalis</i> exhibited a strong preference for woodland, but avoided cropland and manmade structures. From 2006 to 2014-2015, the suitable habitat decreased 4.1%, and all six indices showed an increase in habitat fragmentation. The occupancy rate of different-sized woodland patches was positively correlated with patch size. Mapping suitable habitat and identifying the potential gaps in functional habitat connectivity can be used to guide effective measures for conserving <i>Z. arvalis</i>.</p>\",\"PeriodicalId\":43064,\"journal\":{\"name\":\"Egyptian Pediatric Association Gazette\",\"volume\":\"65 1\",\"pages\":\"e71\"},\"PeriodicalIF\":0.5000,\"publicationDate\":\"2021-12-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9121362/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Egyptian Pediatric Association Gazette\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.6620/ZS.2021.60-71\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2021/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q4\",\"JCRName\":\"PEDIATRICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Egyptian Pediatric Association Gazette","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.6620/ZS.2021.60-71","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2021/1/1 0:00:00","PubModel":"eCollection","JCR":"Q4","JCRName":"PEDIATRICS","Score":null,"Total":0}
Quantifying the Effect of Land-cover Change on the Endangered Farmland Green Treefrog (Zhangixalus arvalis) in an Agricultural Landscape: Implications for Conservation.
Habitat loss and fragmentation have a significant negative effect on amphibian species, particularly those with specialized habitat requirements. The endangered farmland green treefrog (Zhangixalus arvalis) primarily inhabits woodlands of agricultural landscapes in central Taiwan. Recently, due to increased demands for pineapple products, many woodlands, particularly bamboo plantations, were converted to pineapple fields. This study aimed to quantify the effect of habitat loss and fragmentation on Z. arvalis due to changes in land cover in an agricultural landscape. The study area contained 34,243 50 m × 50 m grids. In 2006 and 2014-2015, we used acoustic surveys to survey the occurrence of Z. arvalis in each grid. We obtained satellite images of the study area for 2006 and 2014, and we assigned the land-cover type of each grid to one of the following six types: woodland, brushland, cropland, bareland, manmade structures and water body. We examined whether Z. arvalis preferred a certain land-cover type by comparing the proportion of cover types available and the proportion of cover types used by the frogs. Furthermore, we used occurrence records for 2006 and 2014-2015 and applied the Maximum Entropy Model to predict suitable habitat for the respective years. We mapped the loss of suitable habitat and used six indices to quantify habitat fragmentation within the 8 years. We also tested the prediction that the occupancy rate of Z. arvalis in different-sized habitat patches was a function of patch size. Zhangixalus arvalis exhibited a strong preference for woodland, but avoided cropland and manmade structures. From 2006 to 2014-2015, the suitable habitat decreased 4.1%, and all six indices showed an increase in habitat fragmentation. The occupancy rate of different-sized woodland patches was positively correlated with patch size. Mapping suitable habitat and identifying the potential gaps in functional habitat connectivity can be used to guide effective measures for conserving Z. arvalis.
期刊介绍:
The Gazette is the official journal of the Egyptian Pediatric Association. The main purpose of the Gazette is to provide a place for the publication of high-quality papers documenting recent advances and new developments in both pediatrics and pediatric surgery in clinical and experimental settings. An equally important purpose of the Gazette is to publish local and regional issues related to children and child care. The Gazette welcomes original papers, review articles, case reports and short communications as well as short technical reports. Papers submitted to the Gazette are peer-reviewed by a large review board. The Gazette also offers CME quizzes, credits for which can be claimed from either the EPA website or the EPA headquarters. Fields of interest: all aspects of pediatrics, pediatric surgery, child health and child care. The Gazette complies with the Uniform Requirements for Manuscripts submitted to biomedical journals as recommended by the International Committee of Medical Journal Editors (ICMJE).