Mysterud Atle, Tryjanowski Piotr, Panek Marek, Pettorelli Nathalie, Stenseth Nils C
Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, P.O. Box 1066, Blindern, 0316, Oslo, Norway.
Oecologia. 2007 Mar;151(2):232-9. doi: 10.1007/s00442-006-0584-z. Epub 2006 Nov 11.
Very few studies on ungulates address issues of inter-specific synchrony in population responses to environmental variation such as climate. Depending on whether annual variation in performance of ungulate populations is driven by direct or indirect (trophic) interactions, very different predictions regarding the pattern of inter-specific synchrony can be derived. We compared annual autumn body mass variation in roe deer (Capreolus capreolus) and wild boar (Sus scrofa) from Poland over the period 1982-2002, and related this to variation in winter and summer climate and plant phenological development [the Normalized Difference Vegetation Index (NDVI), derived from satellites]. Roe deer fawns (approximately 1.3 kg increase from year 1982 to 2002) and yearlings both increased markedly in mass over years. There was also an increase for wild boar mass over years (approximately 4.2 kg increase for piglets from 1982 to 2002). Despite our failure to link annual body mass to spring or winter conditions or the NDVI, the body mass of roe deer and wild boar fluctuated in synchrony. As this was a field roe deer population, and since wild boar is an omnivore, we suggest this may be linked to annual variation and trends in crop structure (mainly rye). We urge future studies to take advantage of studying multiple species in order to gain further insight into processes of how climate affect ungulate populations.
关于有蹄类动物的研究中，很少有涉及到种群对诸如气候等环境变化的种间同步性问题。根据有蹄类动物种群表现的年度变化是由直接还是间接（营养级）相互作用驱动，关于种间同步模式可以得出非常不同的预测。我们比较了1982年至2002年期间波兰狍（Capreolus capreolus）和野猪（Sus scrofa）秋季的年度体重变化，并将其与冬季和夏季气候以及植物物候发育的变化[来自卫星的归一化植被指数（NDVI）]相关联。狍幼崽（从1982年到2002年体重增加约1.3千克）和一岁幼兽的体重多年来都有显著增加。野猪的体重多年来也有所增加（从1982年到2002年仔猪体重增加约4.2千克）。尽管我们未能将年度体重与春季或冬季条件或NDVI联系起来，但狍和野猪的体重同步波动。由于这是一个野外狍种群，并且野猪是杂食动物，我们认为这可能与作物结构（主要是黑麦）的年度变化和趋势有关。我们敦促未来的研究利用对多个物种的研究，以便进一步深入了解气候如何影响有蹄类动物种群的过程。
