Do crayfish affect stream ecosystem response to riparian vegetation removal?

2021 ◽  
Author(s):  
Maura P. Dudley ◽  
Kelsey Solomon ◽  
Seth Wenger ◽  
C. Rhett Jackson ◽  
Mary Freeman ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Ecosystem Response ◽  
Stream Ecosystem ◽  
Vegetation Removal

Stream ecosystem response to multiple experimental floods from a reservoir

2004 ◽  
Vol 20 (4) ◽  
pp. 359-377 ◽  
Author(s):  
Christopher T. Robinson ◽  
Urs Uehlinger ◽  
Michael T. Monaghan
Keyword(s):  
Ecosystem Response ◽  
Stream Ecosystem

Variability in stream ecosystem response to urbanization

2016 ◽  
Vol 40 (5) ◽  
pp. 714-731 ◽  
Author(s):  
Christopher J. Walsh ◽  
Tim D. Fletcher ◽  
Geoff J. Vietz
Keyword(s):  
Water Management ◽  
Regional Differences ◽  
Urban Land ◽  
Drainage Density ◽  
Reference Condition ◽  
Ecosystem Response ◽  
Stream Ecosystem ◽  
Land And Water Management ◽  
Urban Catchments ◽  
The Common

The geomorphic and ecological degradation of streams resulting from urbanization is well recognized. Recent reviews have hypothesized variability in ecological response to urbanization among stream types and among regions with varying climate and catchment soil and geology. Testing such hypotheses will be aided by the use of consistent metrics of the primary processes that drive urban-induced degradation of streams. We thus developed an urban typology distinguishing the common classes of urban land and water management that are hypothesized to have different effects on stream ecosystems. In developing the typology, we identify and emphasize the importance of step changes (thresholds) in the hydrologic consequences of urbanization, the often-unrecognized massive increase in drainage density of urban catchments, the difficulty in setting reference condition for many cities and the resulting difficulties in comparing responses to urbanization among cities. We critically assess the evidence for variability in responses to urbanization and its causes, and conclude that there are few studies demonstrating intra- or inter-regional differences in response to urbanization that have adequately accounted for the influence of potential differences in urban land and water management. We use the urban typology to propose metrics to allow such accounting, which we argue is necessary to advance management for stream protection and restoration.

Stream ecosystem response to small dam removal: Lessons from the Heartland

Geomorphology ◽  
2005 ◽  
Vol 71 (1-2) ◽  
pp. 227-244 ◽  
Author(s):  
Martin W. Doyle ◽  
Emily H. Stanley ◽  
Cailin H. Orr ◽  
Andrew R. Selle ◽  
Suresh A. Sethi ◽  
...  
Keyword(s):  
Dam Removal ◽  
Ecosystem Response ◽  
Stream Ecosystem

scholarly journals Effects of riparian vegetation removal on nutrient retention in a Mediterranean stream

2000 ◽  
Vol 19 (4) ◽  
pp. 609-620 ◽  
Author(s):  
Francesc Sabater ◽  
Andrea Butturini ◽  
Eugènia MartÍ ◽  
Isabel Muñoz ◽  
Anna Romaní ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Nutrient Retention ◽  
Vegetation Removal ◽  
Mediterranean Stream

scholarly journals Effect of the riparian vegetation removal on the trophic network of Neotropical stream fish assemblage

2018 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
Pedro Sartori Manoel ◽  
Virginia Sanches Uieda
Keyword(s):  
Fish Assemblage ◽  
Riparian Vegetation ◽  
Niche Overlap ◽  
Forest Fragment ◽  
Vegetation Removal ◽  
Trophic Networks ◽  
Key Factor ◽  
Trophic Network ◽  
Dry Seasons ◽  
Food Niche

The study of the diet of fish is an important tool to assess different levels of environmental degradation, since the availability of food in the environment is a key factor for the fish occurrence. The removal of riparian vegetation usually degrades environmental quality, as this vegetation has an important role in providing energy to the ecosystem. This study investigates the effects of the removal of riparian vegetation on the fish assemblage trophic network. The study was carried out in two stretches of a southeastern Brazilian stream, one in a forest fragment and another in a pasture, during the wet and dry seasons of 2014. We analyzed the items consumed by each fish species using the frequency of occurrence and area of each item, which were combined to calculate the alimentary index, which was used to determine the food niche overlap of the fish and the specialization index of the trophic network. Aquatic Hexapoda, vegetal debris and organic matter dominated the trophic network of the two stretches. We detected higher values of food niche overlap in the forested stretch and more complex trophic networks in the pasture stretch. We found few seasonal variations in the items consumed and calculated indices in both stretches studied. The presence of grass on the banks in the pasture stretch and the importation of food resources from the upstream area may have provided a higher diversity of resources and consequently showed a more complex trophic network when compared to the forested stretch.

STREAM ECOSYSTEM RESPONSE TO LIMESTONE TREATMENT IN ACID IMPACTED WATERSHEDS OF THE ALLEGHENY PLATEAU

2007 ◽  
Vol 17 (4) ◽  
pp. 1087-1104 ◽  
Author(s):  
Sarah E. McClurg ◽  
J. Todd Petty ◽  
Patricia M. Mazik ◽  
Janet L. Clayton
Keyword(s):  
Ecosystem Response ◽  
Stream Ecosystem ◽  
Allegheny Plateau

scholarly journals Conservation status and bio-ecology of Brycon orbignyanus (Characiformes: Bryconidae), an endemic fish species from the Paraná River basin (Brazil) threatened with extinction

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Lívia Helena Tonella ◽  
Rosa Maria Dias ◽  
Oscar Barroso Vitorino Junior ◽  
Rosemara Fugi ◽  
Angelo Antonio Agostinho
Keyword(s):  
River Basin ◽  
Riparian Vegetation ◽  
Conservation Status ◽  
Hydrological Regime ◽  
Paraná River ◽  
Remarkable Effect ◽  
Parana River ◽  
Vegetation Removal ◽  
La Plata Basin ◽  
Paraná River Basin

ABSTRACT Brycon orbignyanus is an endemic species from La Plata basin whose stocks have been presenting significant reductions throughout the Paraná River. Brycon orbignyanus is categorized as an endangered species. This study evaluated aspects of the bio-ecology of this species that may be related to this threat, highlighting its distribution, abundance, and diet as well as the corresponding relationships between its recruitment and flood regimes. Data were obtained from different parts of the upper Paraná River (stretches free and regulated by dams) from 1986 to 2010 with more detailed data collected from the free remnant of this basin. The results indicate that no records for species exist at more than half of the sampling points located in dam-regulated sections of the Paraná River, whereas specimens were collected from 75% sites in the free plain remnant. We observed a remarkable effect of the hydrological regime on recruitment as well as distinct food demands during ontogenetic development, with adults almost exclusively consuming fruits and seeds, revealing that these individuals are supported by riparian vegetation. Thus, it is concluded that changes in the natural flood regime as well as riparian vegetation removal threaten B. orbignyanus populations in the Paraná River basin.

scholarly journals The functional feeding groups’ structure of aquatic insects in upstreams of Da Nhim river, Lam Dong province

2015 ◽  
Vol 18 (2) ◽  
pp. 25-35
Author(s):  
Thong Ngoc Minh Bui ◽  
Khiem Trong Hoang ◽  
Huy Duc Hoang
Keyword(s):  
Functional Groups ◽  
Aquatic Insects ◽  
Riparian Vegetation ◽  
Nutrient Balance ◽  
Diversity Indices ◽  
Functional Feeding Groups ◽  
Stream Ecosystem ◽  
Functional Feeding Group ◽  
Feeding Groups ◽  
Dry And Rainy Seasons

Study on the functional feeding group (FFG) structure of aquatic insects in upstreams of Da Nhim river to understand the ecological functional groups in the watershed. The study investigated two headwater streams (A and B) of upper Da Nhim river in the dry and rainy seasons 2013). Quantitative sampling, diversity indices, grouping the FFGs and analysing correlation between the FFGs conducted in each season. Results showed that: (1) Shannon - Weiner indices (H') were 3.0-4.4, and Simpson indices (λ) were 0.06-0.13; (2) The FFG structure included five groups: collector - garthering (cg) (46 %), scrapper (sc) (31 %), collector - filtering (cf) (12 %), predator (p) (8 %) and shredder (sh) (3 %); (3) The correlations were possitive and stability in seasons. Shredder (sh) implied the intact riparian vegetation; and the occurrence of predators in both two seasons, implied the nutrient balance in the stream ecosystem. The FFG structures should be documented in the continuing lower reaches of the Da Nhim river to fulfill data in the whole system of Dong Nai river

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