JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editor in Chief
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
Read Journal
    Current Issue
    Journal Archives
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
    JEB Awards

Google Search the Journal web-site:

    Abstract - Issue Sep 2011, 32 (5)                                     Back

nstantaneous and historical temperature effects on a-pinene

Influence of the alocal spring warming on the breeding phenology

in blackcp (Sylvia atricapilla) in Croatia


Author Details


Z. Dolenec

(Corresponding author)

Department of Zoology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000,



P. Dolenec

High School Oroslavje, Ljudevita Gaja 1, HR-49243 Oroslavje, Croatia





Publication Data

Paper received:

21 July 2010


Revised received:

10 December 2010



08 January 2011



Recent papers have shown that climate change affects many species, including birds. Several papers from different areas have devoted attention to the negative correlation between the dates of breeding and year, and also negative correlation between the dates of breeding and air spring temperatures. Recent work give some firm evidence for postulating causal relationship between spring temperature and laying dates. We used 31 years (1979-2009) of data from blackcap Sylvia atricapilla in Mokrice area, Northwestern Croatia to assess whether there has been any systematic change in breeding phenology through time. Among environmental factors possibly affecting the breeding date, consideration was given to mean monthly air temperatures (April-May). Over the past three decades, the breeding date of blackcap in our study population has changed significantly: They started breeding progressively earlier (11.77 days). Two regression analysis with laying date as criterion variable showed that spring temperatures can significantly predict variation of laying date and that there are also some other unknown factors which significantly explain variation of laying date. We conclude that blackcaps across northwestern Croatia are breeding earlier and that mean air spring temperatures is probably the most important factor causing it, among other factors.


Key words

Blackcap, Trend, Laying date, Spring temperatures, Croatia


Copyright ? 2011 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).