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作 者:张丽源 水柏年 胡成业 王晶 章凯 周泽宇 周鑫 方学河 李艺 刘永钿 ZHANG Liyuan;SHUI Bonian;HU Chengye;WANG Jing;ZHANG Kai;ZHOU Zeyu;ZHOU Xin;FANG Xuehe;LI Yi;LIU Yongtian(College of Fishery,Zhejiang Ocean University,Zhoushan 316000,China)
出 处:《中国水产科学》2023年第1期86-95,共10页Journal of Fishery Sciences of China
基 金:浙江省省属高校基本科研业务费项目(2021J003);浙江省自然科学基金项目(LQ21C030006).
摘 要:生境适宜性评价是生物资源评估及多样性保护的重要前提和基础。基于2020年7月(夏季)、10月(秋季)及12月(冬季)沿浦湾红树林大型底栖动物和环境因子调查数据,选择大型底栖动物优势种尖锥拟蟹守螺(Cerithidea largillierti)作为研究对象,开展生境适宜性研究。本研究采用广义加性模型对环境因子进行初步筛选,并利用相对权重法确定环境因子的权重,然后分别使用加权平均法和几何平均法建立栖息地适宜性指数模型,通过交叉检验并基于赤池信息准则(Akaike Inforamation Iriterion,AIC)确立最优模型。结果表明,基于几何平均法构建的栖息地适宜性指数模型最优,选取温度、氨氮、活性磷酸盐、溶解氧、电导率、亚硝酸盐、pH及硝酸盐为解释变量,具有最小AIC值。时间生境适宜性指数表现为秋季>夏季>冬季;空间生境适宜性指数表现为离岸段>中段>近岸段、西北部>东南部。研究发现,沿浦湾红树林尖锥拟蟹守螺生境适宜性存在较明显的时空异质性。Habitat suitability assessment is an important prerequisite and basis for assessing biological resources and protecting biodiversity.Based on the survey data of macrobenthos and environmental factors in the summer,autumn,and winter of 2020 in the mangrove of Yanpu Bay,we have studied the habitat suitability of macrobenthos.In this study,Cerithidea largillierti,the dominant species of macrobenthos,was selected as the research object.A Generalized Additive Model was used to screen environmental factors,and the relative weight method was used to determine the weight of environmental factors.Then,the habitat suitability model was established by using the Weighted Average Model and Geometric Mean Model,respectively,and the optimal model was established based on cross check and Akaike Information Criterion(AIC).The results showed that the Habitat Suitability Index model based on Geometric Mean Model was the best fit model,and temperature,ammonia nitrogen,reactive phosphate,dissolved oxygen,electrical conductivity,nitrite,pH,and nitrate with the minimum AIC value were selected as explanatory variables.The temporal Habitat Suitability Index showed that autumn>summer>winter.The spatial Habitat Suitability Index showed that offshore section>middle section>nearshore section,northwest section>southeast section.The results showed that there was obvious spatial and temporal heterogeneity in the habitat suitability of C.largillierti in the mangroves of Yanpu Bay.The findings may be used to raise awareness among researchers and policymakers.In addition,more comprehensive and scientific surveys will help to better understand the habitat suitability of macrobenthos in the future.
关 键 词:尖锥拟蟹守螺 栖息地适宜性指数模型 广义加性模型 红树林生态系统 沿浦湾
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