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Marine influence controls plant phenological dynamics in Mediterranean Mexico

Journal of Plant Ecology 2016年第4期9卷 410-420页

作者： Sula E.Vanderplank Exequiel Ezcurra Botanical Research Institute of Texas 1700 University DriveFort WorthTX 76107USA Department of Botany and Plant Sciences University of California900 University AveRiverside CA 92521USA

Aims To assess the role of moisture in phenological timing in the mediterranean coastal flora of baja california,and specifically to assess the role of coastal fog and ocean-derived moisture in plant *** seems to be the primary driver of flowering times and durations at the arid end of the mediterranean-climate region,where rainfall is often sporadic(temperature and day length can be expected to play a much lesser role as they are not growth limiting).We aimed to understand:What factors drive climatic variation between sites?Are there general flowering patterns allowing us to identify phenological categories?Do flowering patterns vary in relation to site-specific weather?and most importantly,does maritime influence on weather affect flowering dynamics in coastal mediterranean ecosystems?Methods The southernmost extent of the california Floristic Province(in baja california,Mexico)is a biological diversity hotspot of high endemism and conservation value,with two steep moisture gradients:rainfall(N-S)and coastal fogs(W-E),providing an ideal study *** installed five weather stations across the moisture gradients,recording data *** monitored flowering phenology in the square kilometer surrounding each weather station from 2010 to *** 86 plant taxa were monitored across the five sites,every 6-8 *** climatic data is presented with general trends in flowering,and specific flowering syndromes were *** for flowering intensity across the sites was analyzed using a principal components *** Findings Data analysis demonstrates a general seasonal pattern in flowering times,but distinct differences in local weather and phenology between the five study *** flowering syndromes are revealed in the flora:(i)water responders or spring bloomers,(ii)day-length responders or fall-blooming taxa and(iii)aseasonal bloomers with no seasonal *** two moisture gradients are the strongest drivers of flowering t

关键词： flowering times baja california maritime succulent scrub moisture gradient

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