Seasonal variations in abundance and diversity of copepods in Mond River estuary, Bushehr, Persian Gulf

Abstract

Abstract. Hedayati A, Pouladi M, Vazirizadeh A, Qadermarzi A, Mehdipour N. 2017. Seasonal variations in abundance and diversity of copepods in Mond River estuary, Bushehr, Persian Gulf. Biodiversitas 18: 447-452. The present study was carried out to investigate the abundance and biodiversity of copepods from Mond River (MR) estuary, Bushehr, the Persian Gulf during 4 seasons and their relationships with environmental factors. The water samples were collected in mid-season from spring 2012 to winter 2013 for one year period. Copepod samples were collected by using of 140 µm plankton net with 25 cm mouth diameter and vertical towing in all stations. Copepod assemblages were comprised of 4 orders, 13 families, and 10 genera. Orders were included; Calanoida, Cyclopoida, Poecilostomatoida, Harpacticoida and Genera were included: Cathocalanus, Acrocalanus, Paracalanus, Subeucalanus, Centropages, Temora, Calanopia, Labidocera, Pontella, Acartia, Oithona, Oncaea, Corycaeus, Microsetella, Microsetella .2) and in winter (0.83±0.12 and 2.39±0.15), respectively. The copepod assemblages had most amounts of diversity and abundance at station 5 in all seasons. Pearson correlation showed a significant correlation between copepod diversity and abundance with salinity, pH and temperature. Results showed that salinity factor was more effective environmental factor on Simpson (0.01> P and r=0.783) and Shannon-Weiner indices (0.01> P and r=0.727), and copepods abundance (0.01> P and r=0.664) in MR estuary.

Effect of AL-Tharthar Canal on the Zooplankton Composition and Diversity in the Tigris River

“…As well as, the reduction of the density of phytoplankton. This found is agree with Hedayati et al [63].…”

Impact of Tharthar Arm Water on Composition and Diversity of Copepoda in Tigris River, North of Baghdad City, Iraq

“…Low value of this index in winter may be related to the decreasing of water temperature which is the main reason for reduction of egg production and number of immature stages; as well as, reduced the density of phytoplankton. These findings corresponded with Hedayati et al (2017) indicated that the values of species index for copepod decreased with the decreasing of water temperatures.…”

“…On the other hand, the values of this index raised in spring, this may be returned to the increasing of sunlight intensity and photosynthesis rates this in turn increases phytoplankton production which is subsequently increased Copepoda diversity (Hedayati et al, 2017).…”