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Dynamics of Common Sterna hirundo and Little Tern Sternula albifrons populations along the Sava River in North-western Croatia between 2002 and 2019
- Source :
- Acrocephalus, Vol 40, Iss 180-181, Pp 49-54 (2019)
- Publication Year :
- 2019
- Publisher :
- Walter de Gruyter GmbH, 2019.
-
Abstract
- Between 2002 and 2019, monitoring of Common Tern Sterna hirundo and Little Tern Sternula albifrons along the Sava River near Zagreb, Croatia was conducted. Natura 2000 site “Sava kod Hrušćice” was designated to protect colony at river islands, with estimated population sizes of 100–150 pairs of Common and 20 pairs of the Little Tern. Flooding of the colony caused breeding failure in several years. Common Terns moved to breed on islands in gravel pits with a total population around 150 pairs, while Little Tern did not breed after 2010. In the last few years, terns have not bred at Hrušćica and the only colony inside the Natura 2000 site is situated on a breeding platform at Siromaja gravel pit. Channelling of rivers and hydropower plants are the main threats, changing natural dynamics of water level and causing reduction of gravel sediment in rivers.
- Subjects :
- common tern sterna hirundo
education.field_of_study
threats
biology
Gravel pit
Sterna
Little tern
Flooding (psychology)
Population
little tern sternula albifrons
natura 2000 site
General Medicine
biology.organism_classification
sava river
Fishery
monitoring
Common Tern Sterna hirundo
Little Tern Sternula albifrons
Sava River
Natura 2000 site
Geography
QL1-991
Hirundo
Tern
Natura 2000
education
Zoology
Subjects
Details
- ISSN :
- 21996067
- Volume :
- 40
- Database :
- OpenAIRE
- Journal :
- Acrocephalus
- Accession number :
- edsair.doi.dedup.....d9d7c5bca1d648828ef52162738a5bee