نتایج جستجو برای: broadleaved trees
تعداد نتایج: 90427 فیلتر نتایج به سال:
Abstract. We present the first gridded and temporally continuous quantitative pollen-based plant-cover reconstruction for temperate northern subtropical China over Holocene (11.7 ka to present) obtained by applying Regional Estimates of VEgetation Abundance from Large Sites (REVEALS) model. The objective is provide a dataset land cover last ca. 12 millennia that suitable palaeoclimate modelling...
Litterfall, directly and indirectly, affects the soil physicochemical properties, microbial activity, diversity of fauna flora by adding organic matter nutrients to soil. This study explores litterfall dynamics such as production, litter decomposition rate, associated nutrient return in three forest types, that is, camphor tree (CTF), Masson pine (MPF), mixed (CMF), subtropical China. Results s...
The Late Miocene palaeofloras of the La Cerdanya Basin represent a unique look into Pyrenean forested areas Iberian Peninsula at time when European warm and humid climate was experiencing progressive cooling aridification. Macrofossils (leaves, seeds, fruits cones) miospores from several outcrops revealed composition abundances different plant species present in area during Tortonian early Mess...
Bracket fungi are the most important macroscopic fungi in the forest as trees are parasitic and saprophytic . This aim of this study is investigation on relate of between some of the characteristics of host and frequency of bracket fungi in district one of Shastkolate forest of Gorgan . Inventory of trees infected by bracket fungi was done using two strip transects and Factors , including the...
Rotten and dead trees are the main component of forest ecosystems and play an important role in maintaining forest biodiversity. In this research frequency and characteristics of large diameter trees (normal, rotten, and dead trees) with diameter at breast height greater than 60 cm were studied in two compartments (selective logged and protected) in Asalem-Nav forest. Random systematic sampling...
The aim of this study was to investigate vegetation composition in broadleaved and conifers plantations in 220 ha of Loblloly pine (Pinus taeda), alder (Alnus glutinosa( and poplar (Popolus deltoides) hardwood plantations and its comparison with natural forests in Bibiyanlu protected forest park, Astara. A total of 60 sampling plots of 1000 m2 were taken using randomly-systematic method with1...
Accurate individual tree segmentation (ITS) is fundamental to forest management and the studies of ecosystem. Unmanned Aerial Vehicle Light Detection Ranging (UAV-LiDAR) shows advantages for ITS height estimation at stand landscape scale. However, dense deciduous forests with tightly interlocked crowns challenge performance ITS. Available LiDAR points through crown appropriate algorithm are exp...
Global forest cover is heavily fragmented. Due to high edge-to-surface ratios in small patches, a large proportion of forests affected by edge influences involving steep microclimatic gradients. Although edges are important ecotones and account for 20% the global forested area, it remains unclear how biotic abiotic drivers affect microclimates at continental scale. Here we report soil air tempe...
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