Home About Browse Search

When climate is changing: effects of phenology and local climate on individual fitness

Öberg, Meit (2014). When climate is changing: effects of phenology and local climate on individual fitness. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2014:12
ISBN 978-91-576-7972-7
eISBN 978-91-576-7973-4
[Doctoral thesis]

[img] PDF


The fitness impacts of climate change on seasonal breeding organisms is, in part, linked to local climatic effects on phenology (i.e. the timing of major life events, such as breeding and migration) and how these relate to temporal changes in resource distribution. Thus, in this thesis we examine relationships between phenology, measures of fitness (reproduction and survival) and local climate for a long-distance migratory bird species, the northern wheatear (Oenanthe oenanthe).

There was a seasonal fitness decline in this population, but the relative contribution of different reproductive components to this decline varied. Because declines in these fitness components were driven by different factors this suggests climate change is unlikely to affect fitness components equally. This unequal susceptibility of different fitness components to climate change was further demonstrated by different responses in reproduction and survival to rainfall, and that these effects were age-, sex- and time-dependent. During the past 20 years, wheatears have advanced their migration to arrive and begin breeding ~8 days earlier than in the early 1990s. Regardless, this change in migration and breeding phenology may be lagging behind current climate change because birds are breeding increasingly later relative to the progression of spring. One factor potentially contributing to this phenological mismatch is limited plasticity in the arrival-breeding interval, arising from constraints on how much the interval can be reduced after migration. Another constraint on the ability for birds to advance their breeding time is the cost of reproduction carried over from one breeding season to the next. This impacts on individual fitness through delays in breeding phenology and the fitness loss associated with seasonal fitness declines.

Overall, this thesis shows that to avoid underestimation of potential effects of climate change on population demography, all fitness components and their drivers need to be considered. In addition, it highlights potential constraints preventing individuals from optimally adjusting their breeding time in order to track environmental change. Such knowledge is crucial if we are to make informed decisions regarding the management of populations in the future.

Authors/Creators:Öberg, Meit
Title:When climate is changing: effects of phenology and local climate on individual fitness
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2014
Number of Pages:45
I.Öberg, M., Pärt, T., Arlt, D., Laugen, A. T. and Low, M. (2014). Decomposing the seasonal fitness decline. Oecologia 174(1), 139-150.
II.Öberg, M., Arlt, D., Pärt, T. and Low, M. Delayed timing of breeding as a cost of reproduction (manuscript).
III.Öberg, M., Low, M., Pärt, T., Arlt, D. and Knape, J. Phenological adjustments to spring temperature: effects on the arrival-breeding interval (manuscript).
IV.Öberg, M., Pärt, T., Arlt, D., Laugen, A. T., Eggers, S. and Low, M. Rainfall during parental care affects multiple fitness components (manuscript).
Place of Publication:Uppsala
Publisher:Institutionen för ekologi, Sveriges lantbruksuniversitet
ISBN for printed version:978-91-576-7972-7
ISBN for electronic version:978-91-576-7973-4
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:passeriformes, weather, animal health, habitats, nest boxes, nesting, quality, phenology, climate, reproductive performance, survival, animal migration, predation, population dynamics
Keywords:Weather, habitat quality, individual quality, nest predation, carry-over effects, pre-breeding period, precipitation, survival, reproductive performance, nestling
Permanent URL:
ID Code:11017
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: Meit Öberg
Deposited On:20 Feb 2014 07:55
Metadata Last Modified:13 Dec 2014 19:11

Repository Staff Only: item control page


Downloads per year (since September 2012)

View more statistics