Open Access

Table 9

Long-term changes of total macrobenthos average biomass in Lake Qarun during 1974–2013 g (wet weight) m-2.

Season 1974* 1975* 1989** 1993** 1994** 1995** 1999-2000** 2006*** 2008 2011 2012 2013 Av CV
Winter 2112.2 2170.3 111.6 132.3 75.7 22.6 9.5 63.0 33.3 32.1 0.710

Spring 3309.4 2328.9 58.5 143.8 122.8 34.7 40.7 60.0 29.6 41.3 0.322

Summer 2020.0 2061.7 49.3 154.0 84.6 76.4 23.7 99.6 16.0 53.9 0.753

Autumn 2668.3 2383.3 70.9 112.2 52.1 29.6 32.2 41.0 33.6 34.1 0.143

Ann. average 2527.5 2223.3 81 76.7 72.6 135.6 83.8 40.8 26.5 70.3 43.2 31.4 40.4

CVt 0.235 0.066 0.379 0.132 0.351 0.593 0.502 0.519 0.245

Note:

*

Abdel-Malek and Ishak (1980);

**

El-Shabrawy and Dumont (2009);

***

El-Shabrawy and Khalifa (2007).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.