摘要
为了解南麂列岛附近海域底栖贝类群落特征及分布情况,于2022年10月(秋季)、2023年3月(春季)对南麂列岛周围海域进行底栖贝类的拖网调查.结果表明:共捕获底栖贝类49种,隶属2纲6目17科,春季底栖贝类平均丰度为(2429±2038)ind./Agt,平均生物量为(4849.79±2513.84)g/Agt;秋季底栖贝类平均丰度为(1149±1 589)ind./Agt,平均生物量为(4985.30±2 159.23)g/Agt,主要优势种为棒锥螺Turritella bacillum、浅缝骨螺Murex trapa、结蚶Tegillarca nodifera、杰氏裁判螺Inquisitor jeffreysii、习见赤蛙螺Bufonaria rana、中华衲螺Cancellaria sinensis、白带三角 口螺Trigonaphera boca-geana,其中棒锥螺是春季和秋季共有优势种,且优势度均远高于其他种;该海域贝类群落优势种较稳定,群落的功能和性质由少数种类控制.本研究为南麂列岛海洋生态系统动态变化过程提供参考依据,为海洋生态环境保护提供基础资料.
Abstract
To understand the characteristics and distribution of benthic shellfish communities in the vicinity of the Nanji Islands,we conducted bottom trawl surveys in the surrounding waters during October 2022(autumn)and March 2023(spring).The findings reveal that a total of 49 benthic shellfish species were captured,spanning 2 classes,6 orders,and 17 families.During spring,the average abundance of benthic shellfish was(2 429±2 038)ind./Agt,with an average biomass of(4 849.79±2 513.84)g/Agt.In autumn,the average abundance was(1 149±1 589)ind./Agt,with an average biomass of(4 985.30±2 159.23)g/Agt.The primary dominant species comprised Turritella bacillum,Murex trapa,Tegillarca nodifera,Inquisitor jeffreysii,Bufonaria rana,Cancellaria sinensis and Trigonaphera bocageana.Notably,Turritella bacillum emerged as a dominant species in both spring and autumn,with dominance significantly surpassing that of other species.The dominance of benthic shellfish com-munities in this marine area appears relatively stable,with the community's functionality and nature being primar-ily governed by a select few species.This study provides a reference basis for the dynamic changes in the marine ecosystem of the Nanji Islands and offers foundational data for the protection of marine ecological environments.
基金项目
南麂列岛国家海洋自然保护区管理局项目(812105360)
国家自然科学基金(42076156)
维普
万方数据