TY - JOUR JF - JOC JO - VL - 4 IS - 14 PY - 2013 Y1 - 2013/7/01 TI - An Investigation of the Relation Between Dominant Orders of Macrobenthos and Environmental Parameters in the Southern Caspian Sea Using Canonical Correspondence and Principle Component Analyses TT - بررسی روابط بین رده‌های غالب کفزیان و برخی پارامترهای محیطی در حوضه‌ جنوبی دریای خزر با به‌کارگیری آزمون‌های چند متغیره تناظر متعارف‌کننده و مولفه‌ی اصلی N2 - The aim of this study was to find the relations between macro-benthos dominant orders and environmental parameters using mono and multivariate analysis in the southern part of the Caspian Sea in 2009-2010. 160 samples were collected in four seasons and in eight transects perpendicular to the coast from depths of 5, 10, 20, 50 and 100 meters. Results of the current study showed that Polychaeta had the highest abundance compared to other main orders (Oligochaeta and Crustacea). Results also indicated that CCA test was more compatible with ecological evidences compared to mono and other multivarite anaylysis (PCA). The CCA results showed that Polychaeta was in inverse relationship with TOM and siltclay, while the Oligochaeta was directly related to sediments characteristics (TOM) and in inverse relationship with environmental parameter (DO%). The dominance of deposit feeder group of Polychaeta (Streblospio genus from Spionidae) indicates high level of organic matter in sediment and trophic status of ecosystem. SP - 57 EP - 68 AU - Nasrollahzadeh Saravi, Hassan AU - Solimaniroudi, Abdollah AU - Makhlough, Asieh AU - Negarestan, Hossein AU - Eslami, Fereshteh AD - KW - Macrobenthos KW - Environmental parameters KW - Multivariate analysis KW - Caspian Sea. UR - http://joc.inio.ac.ir/article-1-375-en.html ER -