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(Article of periodic en Anglais - 2010)

Document title

Influence of perennial colonies of piscivorous birds on soil nutrient contents in a temperate humid climate

Authors(s) and Affiliation(s)

BREUNING-MADSEN H. (1) ; EHLERS-KOCH C. (1) ; GREGERSEN J. (2) ; LUND LØJTNANT C. (3) ;
(1) Dep. of Geography and Geology, Univ., Copenhagen, DANEMARK
(2) Naturreservat Vorsø, Søvind, DANEMARK
(3) Dep. of Biology, Univ., Copenhagen, DANEMARK

Abstract

The influence of perennial colonies of piscivorous birds on soil nutrient contents and accumulation of carbon, nitrogen and phosphorus in a humid climate has been determined by measuring pH, electric conductivity and content of carbon, nitrogen, phosphorus, calcium and potassium in a reference area and in 2 cormorant sub-colonies. In general, the soils exposed to cormorant guano had lower pH and higher contents of plant available phosphorus, calcium and potassium compared to the control reference soil, and the magnitude of increase in nutrient content varied with the bird-dropping density and the age of the colony. In addition, soil influenced by cormorants had a higher electric conductivity compared to the control reference and can be classified as saline soils. Under influence of the cormorants the herb vegetation below the nesting areas has been changed

Source

Article of periodic

published at : Geografisk tidsskrift / ISSN 1903-2471

Editor : Det Kongelige Danske Geografiske Selskab, Kobenhavn - DANEMARK (2009)

Millesime : 2010, vol. 110, no1 [pp. 25-35]

Bibliographic references : 35 ref.

Collation : 2 fig., 8 tabl.

Language

Anglais

Localisation

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