| Autor: |
Smithies, Sean, Fleming, Patricia A., Bateman, Philip W., Hardy, Giles E. St. J., Dundas, Shannon J. |
| Předmět: |
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| Zdroj: |
Pacific Conservation Biology; 2023, Vol. 29 Issue 4, p312-324, 13p |
| Abstrakt: |
Context: Extreme drought can result in the widespread die-off of forests and dramatically altered ecosystem structure. Such changes are likly to influence fauna using resouces within these forests. Aims: Following a record hot and dry year/summer in 2010/11, large-scale canopy collapse occurred within a Mediterranean-type mixed jarrah (Eucalyptus marginata)–marri (Corymbia calophylla) forest in south-west Western Australia. We investigated the effects of this collapse on bird assemblages in 2016, 5 years after the initial collapse. Methods: We carried out bird surveys using a standardised search method for five paired drought-affected and adjacent healthy forest plots. Key results: A total of 3042 records of 51 bird species were observed across all surveys. Overall, the pooled (mean ± s.d.) reporting rates for drought-affected plots (13.84 ± 0.60 individuals/survey) were significantly less than the reporting rates for healthy plots (34.44 ± 1.03 individuals/survey) (PERMANOVA: F 1 = 54.94, R 2 = 0.31, P = 0.001). Species diversity was also higher in healthy plots (t 26 = 11.21, P < 0.001). Foliage-searching birds were the most abundant guild across all plots and were reported less often in drought-affected plots (t 6 = 2.70, P < 0.04). Conclusions: Drought-affected jarrah forest plots exhibited significant differences in bird assemblages compared to healthy plots. Overall, the drought-affected forest provides a less favourable habitat for birds compared to healthy forest. Implications: With marked variability and extreme climate events predicted for the future, understanding the impacts of such changes will contribute to how we manage forest ecosystems. We investigated the effects of a large-scale drought-induced canopy collapse on bird community assemblages. Overall, the pooled (±s.d.) reporting rates for drought-affected plots (13.84 ± 0.60 individuals/survey) were significantly less than the reporting rates for healthy plots (34.44 ± 1.03 individuals/survey). Foliage-searching birds were the most abundant guild across all plots and were reported less often in drought-affected plots. Overall, the drought-affected forest provides less favourable habitat for bird assemblages compared to healthy forest. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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