نتایج جستجو برای: climatic stem
تعداد نتایج: 308452 فیلتر نتایج به سال:
Many organisms are accumulating climatic debt as they respond more slowly than expected to rising global temperatures, leading disequilibrium of species diversity with contemporary climate. The resulting transient dynamics complex and may cause overoptimistic biodiversity assessments. We propose a simple budget framework integrate two classes intervention: (i) credits that pay some the debt, re...
Understanding and predicting the likely response of ecosystems to climate change are crucial challenges for ecology and for conservation biology. Nowhere is this challenge greater than in the tropics as these forests store more than half the total atmospheric carbon stock in their biomass. Biomass is determined by the balance between biomass inputs (i.e., growth) and outputs (mortality). We can...
Whole genome duplication (WGD) is often considered to be mechanistically associated with species diversification. Such ideas have been anecdotally attached to a WGD at the stem of the salmonid fish family, but remain untested. Here, we characterized an extensive set of gene paralogues retained from the salmonid WGD, in species covering the major lineages (subfamilies Salmoninae, Thymallinae and...
Prosopis cineraria is commonly known as Khejri,It is a Leguminous multipurpose tree.The tree prosopis have climatic adaptation so it can easily survive in a broad range of climatic variation.It is very useful tree and famous specially in desert area due to its spreadability and importance. It is also known as “Golden tree” or “Wonder tree” of the desert. Prosopis cineraria stem bark is useful i...
The response of tree growth to climate can vary over time and geographical space. This study aims to evaluate and compare the climatic drivers of Qinghai spruce (Picea crassifolia Kom.), a species endemic to northwest China, over an elevational gradient, from its lower distributional margin to its upper distributional margin. We sampled pure Qinghai spruce stands and obtained time-series of gro...
BACKGROUND AND AIMS Successive vascular cambia are involved in the secondary growth of at least 200 woody species from >30 plant families. In the mangrove Avicennia these successive cambia are organized in patches, creating stems with non-concentric xylem tissue surrounded by internal phloem tissue. Little is known about radial growth and tree stem dynamics in trees with this type of anatomy. T...
Culicoides imicola is the main vector of the bluetongue virus in theMediterranean Basin. Spatial distribution models for this species traditionally employ either climatic data or remotely sensed data, or a combination of both. Until now, however, no studies compared the accuracies of C. imicola distribution models based on climatic versus remote sensing data, even though remotely sensed dataset...
Developmental plasticity, the acclimation of plants to their local environment, is known to be crucial for the fitness of perennial organisms such as trees. However, deciphering the many possible developmental and environmental influences involved in such plasticity in natural conditions requires dedicated statistical models integrating developmental phases, environmental factors, and interindi...
Morphologic and paleozoogeographic analysis of Cenozoic marine Ostracoda from the Atlantic, Caribbean, and Pacific indicates that climatic change modulates evolution by disrupting long-term stasis and catalyzing speciation during sustained, unidirectional climatic transitions and, conversely, by maintaining morphologic stasis during rapid, high-frequency climatic oscillations. In the middle Pli...
Extreme drought events reduce the productivity of forest ecosystems. One approach for estimating effects on forests is by assessing their resilience. The objective this study was to estimate resilience rates at different heights along tree stem Pinus durangensis Martínez. radial growth 200 cross sections extracted four stems (0.07–0.15, 1.3, 6.3, and 11.0–12.0 m) analyzed subsequently transform...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید