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Migratory movements of Miniopterus schreibersii in the north-east of Spain

100%

Serra-Cobo J., Sanz-Trullen V., Martinez-Rica J. P.

Acta Theriologica

1998

tom 43

nr 3

This article analyses information gathered between 1984 and 1995 relating to the seasonal movements of Miniopterus schreibersii (Kuhl, 1819) in the north-east of Spain. The recapture rate of banded different individuals is 32.5% and the total recapture rate is 53.4%. Ninety five different trajectories have been reported. The bats cover an average distance of 120 km between their hibernation sites and summer roosts. The longest longevity recorded here is almost 10 years. Localities where M. schreibersii was observed were grouped by seasonal use pattern and according the species biological cycle. Two new hibernation sites, seven new breeding sites and sixteen new equinoctial sites have been discovered in this study. From the verified flight trajectories, the distribution of shelters and the ethological characteristics of the species, the most probable migration path have been established.

Seasonal behavior and spatial fluctuations of groundwater levels in long-term irrigated agriculture: the case of a sugar estate

58%

Dinka M. O., Loiskandl W., Ndambuki J. M.

Polish Journal of Environmental Studies

2013

tom 22

nr 5

This paper presents results on the spatial and temporal fluctuations of the groundwater table depth (GWTD) at Wonji-Shoa Sugar Estate (WSSE). Accordingly, spatial maps of GWTD were produced in a GIS (ArcView 3.3) environment from 35 groundwater monitoring piezometers. Results of the study revealed that WSSE, after nearly 60 years of irrigation, is experiencing a serious waterlogging problem. The groundwater (GW) depth is extremely shallow (<1 m below ground) in most of the piezometers throughout the entire season and showed great spatio-seasonal variability. The rate of annual increment of GW rise, coupled with seasonal fluctuation, has obvious repercussions and grave consequences for the sustainability of WSSE in particular and to the region in general. Unless the potential causes for the rise of GWTD are identified soon and feasible corrective measures for mitigating GW rise are introduced, severe crises in the region are inevitable.

Ograniczanie wyników

1 Acta Theriologica

1 Polish Journal of Environmental Studies

1 Dinka M. O.

1 Loiskandl W.

1 Martinez-Rica J. P.

1 Ndambuki J. M.

1 Sanz-Trullen V.

1 Serra-Cobo J.

1 2013

1 1998

Wyniki wyszukiwania

Migratory movements of Miniopterus schreibersii in the north-east of Spain

Seasonal behavior and spatial fluctuations of groundwater levels in long-term irrigated agriculture: the case of a sugar estate