2016年12月20日 大域情報(GI)セミナー 案内
とき ：2016 年 12月 20日（火）15:00-16:00
ところ：奈良女子大学理学部 G棟3階 G-307
Community Structure Responding to Natural and Anthropogenic Variability
Tae-Soo Chon, Prof. (Emer.) Pusan National University, Busan, Republic of Korea Kyung Hee University, Seoul, Republic of Korea Ecology and Future Research Association, Busan, Republic of Korea
Disturbance and stress are ubiquitous, contributing to overall ecosystem malfunctioning greatly. Communities respond to natural and anthropogenic variability in a complex manner in ecosystem functioning. Community structure properties were examined with benthic macroinvertebrates collected in streams in Korea across different levels of pollution. The relationship between species richness and abundance was presented with the Power law: the parameter (α) was reported to be in a narrow range in 0.4 – 0.5 in the least polluted condition while the value was close to 0.1 - 0.2 in the severely polluted condition. Species abundance distributions (SADs) were also efficient in presenting community states in responding to natural (e.g., seasonality) and anthropogenic (e.g., pollution) variability. According to SAD models the pollution states were broadly divided into weak and strong pollution groups. Coefficients of variation in the SAD slopes were further suitable in dividing less and slightly polluted states within the weak pollution group. Within the strong pollution group, a mixture of log-normal distribution and geometric series separated polluted and severely polluted states for monitoring. Community structure properties would be an efficient method for addressing ecological integrity and could be a reference system in reflecting effects of natural and anthropogenic variability in stream ecosystems.
アクセス
６３０−８５０６
奈良市 北魚屋西町 北魚屋西町
奈良女子大学 G棟
E-mail: seto[at]ics.nara-wu.ac.jp
数理生命システム分野の研究室はG棟3階にあります。
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