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Showing 3 results for Waterbirds
Abbas Ashoori,
Volume 5, Issue 1 (6-2013)
Abstract
This study wasdone from April 2005 to March 2006 for the purpose of investigation of diversity and density ofwater birds in international wetland of Koolab of Kiashahr and Sefidrud estuary and also for comparing the current status of wetlands with international criteria in 1354. A total of 81 species of waterbirds from 16 families and 6 orders were recorded in three parts of this wetland(Kiashahr wetland, 22 Bahman Wetland and Sefidrud estuary).They consisted of 47 percent waterfowls and 53 percent waders. Diverse families, belonged to Scolopacidae (19 species), Anatidae (14 species) and Lariidae (14 species), respectively. Also, Anatidae species comprised the largest population of this wetland. Most birds were counted in winter and lowest in spring. The highest diversity observed in 22 Bahman wetland. The species diversity in 22 Bahman wetland was similar withKiashahr wetland (J=5.14) and in terms of population 22 Bahman wetland and Sefidrood estuary showed highest similarity (R = 92.3). Grey Pelicans (Pelecanuscrispus), was the only endangered world's birds witch recorded in the wetlands.Comparingthe results of this study with Ramsar convention criteria indicates that the Koolab wetland of Kiashahr and Sefidrud estuary for the terms of criteria 2 and 3 of Ramsar convention, only had the criterion 2a. Compared to the 1970s, the quality of this international wetland has been declined for waterfowl bird’s life. Hence it is proposed as a damaged wetland in Montero list (MR).
Peyman Karami, Saber Ghsemi, Maysam Ghasemi, Majid Hosseini ,
Volume 5, Issue 3 (12-2013)
Abstract
Waterbirds are considered as most outstanding of the animal group for identifying of ecological variations in mangroves. A time gorge of six years (2007-2012) was studied for determination of variations rate in biodiversity index of waterbirds and their relative frequency in Harra Protected Area (HPA) using mid-winter census. The mean value abundance of the waterbirds during the period of study was found to be 12836±4464/340 individuals. The Egretta gularis, Charadrius mongolus, Caldris alpine, Larus cachinnans and Sternaniticola were the dominant species were from family Ardeidae, Charadriidae, Scolopacidae, laridae and Steridae at HPA, respectively. A similarity percentage (SIMPER) analysis indicated that total average similarity of waterbird species in HPA was 62.90%. Furthermore, The HPA was dominated by Dromasardeola, Calidris alpina and Numenius arquata (SIMPER, percentage of contribution to similarity of 18.58%, 13.92%, and 10.69% respectively). Four species of Crab plover, Dunlin, Eurasian Curlew and Terek Sandpiper represented more than 50% of observations at HPA. The results of diversity patterns of waterbirds indicated that the diversity was higher in 2012 as compared to other years, where Shannon-Wiener’s H, Simpson’d index and McIntosh’d index were 2.99, 14.31 and 0.74 respectively. The values for Species Abundance, McIntosh E and Pielou J were calculated to be 41, 0.85 and 0.73 for 2012 respectively. The results were confirmed using Rényi diversity profile. Furthermore, the SHE analysis showed that effective component over number index diversity was Evenness indices and species richness component.
Farhad Hosseini Tayefeh, Mona Izadian, Seyed Mousa Sadeghi, Masomeh Dehghani, Eyyed Qasem Ghorbanzade Zaferani,
Volume 13, Issue 3 (8-2021)
Abstract
Parishan International Wetland is one of the most important freshwater wetlands in Iran, which is on the list of endangered wetlands (Montreux) due to its complete drying up and habitat changes. This research was carried out in 2018 and 2019 to investigate changes in species diversity of waterbirds and it’s relationships with water surface in PIW. Semi-winter census data were collected from the Department of Environmental, Iran. Data were analyzed using the Species Diversity and Richness (SDR-IV) software. Species diversity indices including (Shannon-Wiener and Simpson D), species richness (Margalef and Minhinick) and evenness (Pielou and Simpson E) were calculated in a period of 31 years from 1998 to 2018. Trend of changes of the wetland reservoir surface and land use have been investigated, using satellite images. Results showed that diversity indices had an increasing trend during the years 1988 to 2001 and a decreasing trend from 2001 to 2018. Diversity indices reached lowest value in 2012 with the decrease of the wetland catchment area. The average values of 5-year period of all indices from 1989 to 2008 did not differ significantly, but apart from the Minhinick index, other indices in the period of 2009-2013 and 2014-2018 had significantly lower values. (P<0.5). The wetland reservoir surface had been increasing from 1988 to 2000. From 2001 to 2018, except for the years 2005 to 2007, the trend was decreasing and from 2009, it has had almost no water areas. It was suggested that increasing the surface and depth of the wetland, diversity of incoming water resources, determining the ownership of the surrounding lands, implementation of monitoring programs, evaluation of operational plans and training of stakeholders are the most important strategies to restore biodiversity of wetland waterbirds.
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