Results 21 to 30 of about 41,864 (294)

Clouds, shadows, or twilight? Mayfly nymphs recognise the difference [PDF]

open access: yes, 2006
1. We examined the relative changes in light intensity that initiate night-time locomotor activity changes in nymphs of the mayfly, Stenonema modestum (Heptageniidae).
Allan J.D.   +29 more
core   +3 more sources

Effects of nonlethal tourist activity on the diel activity patterns of mammals in a National Park in Peninsular Malaysia

open access: yesGlobal Ecology and Conservation, 2019
The activity patterns of mammals are highly variable across species and can be affected by many factors, such as daytime length (i.e., sunrise to sunset), temperature, precipitation, predator–prey or competitive interactions and human activities. However,
Ayana Ota   +5 more
doaj   +1 more source

Acoustic behavior of melon-headed whales varies on a diel cycle. [PDF]

open access: yes, 2015
Many terrestrial and marine species have a diel activity pattern, and their acoustic signaling follows their current behavioral state. Whistles and echolocation clicks on long-term recordings produced by melon-headed whales (Peponocephala electra) at ...
Baumann-Pickering, Simone   +4 more
core   +2 more sources

Diel and seasonal courses of ambient carbon dioxide concentration and their effect on productivity of the epilithic lichen Lecanora muralis in a temperate, suburban habitat [PDF]

open access: yes, 2008
Ambient CO₂ concentration (together with CO₂ exchange and microclimate) was recorded every 30 min for 15 months for Lecanora muralis growing in the Botanical Garden Würzburg (Germany, northern Bavaria), a habitat on the outskirts of the city. Annual mean
Green, T.G. Allan, Lange, Otto L.
core   +2 more sources

Intraspecific genetic variability and diurnal activity affect environmental DNA detection in Japanese eel.

open access: yesPLoS ONE, 2021
Environmental DNA (eDNA) analysis with species-specific primer/probe sets is promising as a tool to quantify fish abundance and distribution. Nevertheless, several factors could reduce the accuracy of this method.
Sayaka Takahashi   +4 more
doaj   +1 more source

Diel transcriptional response of a California Current plankton microbiome to light, low iron, and enduring viral infection. [PDF]

open access: yes, 2019
Phytoplankton and associated microbial communities provide organic carbon to oceanic food webs and drive ecosystem dynamics. However, capturing those dynamics is challenging. Here, an in situ, semi-Lagrangian, robotic sampler profiled pelagic microbes at
Allen, AE   +12 more
core   +2 more sources

Small-scale distribution of juvenile gadoids in shallow inshore waters; what role does maerl play? [PDF]

open access: yes, 2004
The indirect effects of demersal fisheries, such as habitat degradation, are currently thought to be impacting gadoid stocks. Maerl fulfils nursery area prerequisites for several invertebrate species, so its role in similar ecosystem service provision ...
Hall-Spencer, JM, Kamenos, NA, Moore, PG
core   +2 more sources

Multispecies diel transcriptional oscillations in open ocean heterotrophic bacterial assemblages [PDF]

open access: yes, 2014
Oscillating diurnal rhythms of gene transcription, metabolic activity, and behavior are found in all three domains of life. However, diel cycles in naturally occurring heterotrophic bacteria and archaea have rarely been observed.
DeLong, Edward   +7 more
core   +1 more source

Seasonal measurements of total OH reactivity emission rates from Norway spruce in 2011 [PDF]

open access: yes, 2013
Numerous reactive volatile organic compounds (VOCs) are emitted into the atmosphere by vegetation. Most biogenic VOCs are highly reactive towards the atmosphere's most important oxidant, the hydroxyl (OH) radical.
Bonn, Boris   +5 more
core   +2 more sources

High-to-low CO2 acclimation reveals plasticity of the photorespiratory pathway and indicates regulatory links to cellular metabolism of Arabidopsis [PDF]

open access: yes, 2012
Background: Photorespiratory carbon metabolism was long considered as an essentially closed and nonregulated pathway with little interaction to other metabolic routes except nitrogen metabolism and respiration. Most mutants of this pathway cannot survive
Alisdair, R.F.   +9 more
core   +4 more sources

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