Results 111 to 120 of about 36,115 (265)
Ranunculus calcareus and its role in lowland streams [PDF]
Ranunculus calcareus , a species of water crowfoot which occurs in clear, nutrient-rich chalk streams, was studied. Seasonal changes in its biomass, its annual production and its fragmentation (leading to downstream movement of the plant) were ...
Dawson, F.H.
core
Species co‐occurrences rely on their ability to explore similar or distinct available resources, and possible niche overlap can prevent their presence and establishment in a given site Damselflies of the Calopterygidae family demonstrated negative co‐occurrences in streams inside and outside PAs, highlighting that their ecological similarity is ...
Joás Silva Brito +13 more
wiley +1 more source
Macrophytes in Artificial Wetland
The role and problem of macrophyte in artificial wetland for wastewater treatment are summarized and some research interests are proposed in this paper. Macrophyte plays three important roles in artificial wetland. 1) Uptake the nutrients, adsorb and accumulate heavy metal and poisonous substances from wastewater.
CHENG Shuiping, WU Zhenbin, KUANG Qijun
openaire +2 more sources
Brown Trout Abundance in Boreal Streams With Large Wood
ABSTRACT Large wood has been found to be a crucial component in riverine ecosystems. However, due to the heavy channelization of rivers and intensive forestry practices over the past few decades, the amount of large wood in these ecosystems has decreased worldwide. River restoration aims to mitigate the effects of channelization and restore the channel
Alisa Koski +3 more
wiley +1 more source
Brown bullhead catfish (ameiurus nebulosus) in Lake Taupo [PDF]
Brown bullhead catfish (Ameiurus nebulosus) were first discovered in Lake Taupo during the early 1980s and are believed to have originated from an illegal liberation into the southern end of the lake.
Barnes, Grant E., Hicks, Brendan J.
core
Consumer resilience suppresses the recovery of overgrazed ecosystems
Abstract Many heterotroph species perish when faced with severe food limitation; others can persist, adapt, and thrive. Sea urchins are emblematic of this paradox: they can overgraze kelp forests to form barren habitats, but can then survive for decades in these nutritionally depauperate seascapes.
Nathan B. Spindel +10 more
wiley +1 more source
The Role of Small Reservoirs in Reducing Reactive N Export Via Denitrification [PDF]
Reactive nitrogen (N), which harms ecosystem health, has been increasing in the biosphere, leading to higher N export to coastal ecosystems. Although man-made reservoirs can be significant sources of greenhouse gases, they can also retain N, thus ...
Phillips, Margaret, Wollheim, Wil
core +1 more source
Abstract Human activities are increasingly driving the co‐occurrence of multiple ecological stressors, resulting in interactive and cumulative impacts that can reshape ecosystem dynamics and accelerate population declines of climate‐sensitive species. Here, we use over two decades of rocky intertidal monitoring data from 17 sites spanning over 1200 km ...
Francis D. Gerraty +6 more
wiley +1 more source
Marsh Interspersion and Muskrat (Ondatra zibethicus) Habitat Use
We used camera traps to measure intensity of habitat use by muskrats along a gradient of marsh interspersion to determine whether reduced interspersion, which may be linked to the invasion of Typha x glauca, may be contributing to widespread muskrat population declines.
Gregory P. Melvin, Jeff Bowman
wiley +1 more source
Kaptai Lake is a developing ecosystem with a linear food web and thereby vulnerable to external influences. The apex predator, Catfish (TL‐3.364), occupied the top trophic niches, while the overabundant (B: 3.264 t/km2) Clupeid (TL‐2.56) dominated the lower trophic level in the food web. The higher values of ecotrophic efficiency for most of the groups
Debashis Kumar Mondal +6 more
wiley +1 more source

