Results 61 to 70 of about 573,851 (275)

Interactions between carbon and nitrogen dynamics in estimating net primary productivity for potential vegetation in North America [PDF]

open access: yes, 1992
We use the terrestrial ecosystem model (TEM), a process-based model, to investigate how interactions between carbon (C) and nitrogen (N) dynamics affect predictions of net primary productivity (NPP) for potential vegetation in North America. Data on pool
Joyce, L. A.   +6 more
core   +2 more sources

Creation of a Pseudotsuga menziesii nucellus cell suspension culture system to produce proteins involved in reproduction

open access: yesApplications in Plant Sciences, EarlyView.
Abstract Premise Cell suspension cultures of Douglas‐fir (Pseudotsuga menziesii) nucellus were created to overcome phenological limitations to the in situ study of bioactive proteins within and secreted by nucellar cells. Methods Proteins isolated from the cell suspension culture medium were analyzed using mass spectrometry, as were Douglas‐fir post ...
Andrea Coulter   +4 more
wiley   +1 more source

Mapping forests in monsoon Asia with ALOS PALSAR 50-m mosaic images and MODIS imagery in 2010. [PDF]

open access: yes, 2016
Extensive forest changes have occurred in monsoon Asia, substantially affecting climate, carbon cycle and biodiversity. Accurate forest cover maps at fine spatial resolutions are required to qualify and quantify these effects. In this study, an algorithm
Bajgain, Rajen   +19 more
core   +2 more sources

The impacts of biological invasions

open access: yesBiological Reviews, EarlyView.
ABSTRACT The Anthropocene is characterised by a continuous human‐mediated reshuffling of the distributions of species globally. Both intentional and unintentional introductions have resulted in numerous species being translocated beyond their native ranges, often leading to their establishment and subsequent spread – a process referred to as biological
Phillip J. Haubrock   +42 more
wiley   +1 more source

Plant water resource partitioning and isotopic fractionation during transpiration in a seasonally dry tropical climate [PDF]

open access: yes, 2017
Lake Chala (3 degrees 19' S, 37 degrees 42' E) is a steep-sided crater lake situated in equatorial East Africa, a tropical semiarid area with a bimodal rainfall pattern. Plants in this region are exposed to a prolonged dry season, and we investigated if (
Bodé, Samuel   +5 more
core   +3 more sources

Some aspects of ice phenology on ponds in central Alaska, USA [PDF]

open access: yesAnnals of Glaciology, 2007
AbstractIce phenology (freeze-up, break-up and duration) was monitored for five seasons between autumn 2001 and spring 2006 at 11 small, shallow ponds in the boreal forest of central Alaska, USA. The sequence in which freeze-up (FU; day of 100% ice cover) and break-up (BU; day of zero ice cover) occurred at the 11 ponds showed moderately high to very ...
Martin O. Jeffries, Kim Morris
openaire   +1 more source

The influence of rivers on seabird foraging ecology

open access: yesBiological Reviews, EarlyView.
ABSTRACT Rivers act as vital arteries to the world's oceans, delivering fresh water and nutrients that sustain marine ecosystems. Globally, river flow increasingly is being altered by climate change and anthropogenic pressures; yet the significance of rivers to predatory marine species, such as seabirds, and the extent to which river‐related changes ...
Julia B. Morais   +2 more
wiley   +1 more source

Spatial-Temporal Distribution of the Freeze–Thaw Cycle of the Largest Lake (Qinghai Lake) in China Based on Machine Learning and MODIS from 2000 to 2020

open access: yesRemote Sensing, 2021
The lake ice phenology variations are vital for the land–surface–water cycle. Qinghai Lake is experiencing amplified warming under climate change. Based on the MODIS imagery, the spatio-temporal dynamics of the ice phenology of Qinghai Lake were analyzed
Weixiao Han   +4 more
doaj   +1 more source

Investigation of spatial and temporal variability of river ice phenology and thickness across Songhua River Basin, northeast China [PDF]

open access: yesThe Cryosphere, 2020
The regional role and trends of freshwater ice are critical factors for aquatic ecosystems, climate variability, and human activities. The ice regime has been scarcely investigated in the Songhua River Basin of northeast China. Using daily ice records of
Q. Yang   +6 more
doaj   +1 more source

The impacts of environmental warming on Odonata: a review [PDF]

open access: yes, 2008
Climate change brings with it unprecedented rates of increase in environmental temperature, which will have major consequences for the earth's flora and fauna.
Adams J.   +165 more
core   +1 more source

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