HOW HAS CLIMATE CHANGE ALTERED NETWORK CONNECTIVITY IN A MOUNTAIN STREAM NETWORK?

2018 ◽  
Author(s):  
Adam S. Ward ◽  
◽  
Noah Schmadel ◽  
Steven M. Wondzell ◽  
Sherri Johnson
Keyword(s):  
Climate Change ◽  
Network Connectivity ◽  
Mountain Stream ◽  
Stream Network

Modeling the response of non-perennial streams to climate change impact: The Bouregreg watershed in Morocco

2021 ◽  
Author(s):  
Anna Maria De Girolamo ◽  
Youssef Brouziyne ◽  
Lahcen Benaabidate ◽  
Aziz Aboubdillah ◽  
Ali El Bilali ◽  
...  
Keyword(s):  
Climate Change ◽  
Assessment Tool ◽  
Swat Model ◽  
Circulation Model ◽  
Hybrid Modeling ◽  
Climate Data ◽  
Global Circulation Model ◽  
Stream Network ◽  
Modeling Framework ◽  
Modeling Approach

<p>The non-perennial streams and rivers are predominant in the Mediterranean region and play an important ecological role in the ecosystem diversity in this region. This class of streams is particularly vulnerable to climate change effects that are expected to amplify further under most climatic projections. Understanding the potential response of the hydrologic regime attributes to climatic stress helps in planning better conservation and management strategies. Bouregreg watershed (BW) in Morocco, is a strategic watershed for the region with a developed non-perennial stream network, and with typical assets and challenges of most Mediterranean watersheds. In this study, a hybrid modeling approach, based on the Soil and Water Assessment Tool (SWAT) model and Indicator of Hydrologic Alteration (IHA) program, was used to simulate the response of BW's stream network to climate change during the period: 2035-2050. Downscaled daily climate data from the global circulation model CNRM-CM5 were used to force the hybrid modeling framework over the study area. Results showed that, under the changing climate, the magnitude of the alteration will be different across the stream network; however, almost the entire flow regime attributes will be affected. Under the RCP8.5 scenario, the average number of zero-flow days will rise up from 3 to 17.5 days per year in some streams, the timing of the maximum flow was calculated to occur earlier by 17 days than in baseline, and the timing of the minimal flow should occur later by 170 days in some streams. The used modeling approach in this study contributed in identifying the most vulnerable streams in the BW to climate change for potential prioritization in conservation plans.</p>

scholarly journals Invertebrate Metacommunity Structure and Dynamics in an Andean Glacial Stream Network Facing Climate Change

PLoS ONE ◽  
2015 ◽  
Vol 10 (8) ◽  
pp. e0136793 ◽  
Author(s):  
Sophie Cauvy-Fraunié ◽  
Rodrigo Espinosa ◽  
Patricio Andino ◽  
Dean Jacobsen ◽  
Olivier Dangles
Keyword(s):  
Climate Change ◽  
Stream Network ◽  
Structure And Dynamics ◽  
Glacial Stream ◽  
Metacommunity Structure

scholarly journals Change of stream network connectivity and its impact on flood control

2020 ◽  
Author(s):  
Yu-qin Gao ◽  
Yun-ping Liu ◽  
Xiao-hua Lu ◽  
Hao Luo ◽  
Yue Liu
Keyword(s):  
Flood Control ◽  
Network Connectivity ◽  
Stream Network

Origin and Storage of Large Woody Debris in a Third-order Mountain Stream Network, Gangwon-do, Korea

2020 ◽  
Vol 34 (3) ◽  
pp. 249-258
Author(s):  
Suk Woo Kim ◽  
◽  
Kun Woo Chun ◽  
Jung Il Seo ◽  
Young Hyup Lim ◽  
...  
Keyword(s):  
Woody Debris ◽  
Large Woody Debris ◽  
Mountain Stream ◽  
Stream Network ◽  
Third Order ◽  
And Storage

Simulation of dynamic expansion, contraction, and connectivity in a mountain stream network

2018 ◽  
Vol 114 ◽  
pp. 64-82 ◽  
Author(s):  
Adam S. Ward ◽  
Noah M. Schmadel ◽  
Steven M. Wondzell
Keyword(s):  
Mountain Stream ◽  
Stream Network

scholarly journals Spatial and temporal variation in river corridor exchange across a 5th-order mountain stream network

2019 ◽  
Vol 23 (12) ◽  
pp. 5199-5225 ◽  
Author(s):  
Adam S. Ward ◽  
Steven M. Wondzell ◽  
Noah M. Schmadel ◽  
Skuyler Herzog ◽  
Jay P. Zarnetske ◽  
...  
Keyword(s):  
Conceptual Model ◽  
Tracer Test ◽  
River Network ◽  
Systematic Variation ◽  
Spatial And Temporal Variation ◽  
Mountain Stream ◽  
River Networks ◽  
Stream Network ◽  
Geologic Setting ◽  
River Corridor

Abstract. Although most field and modeling studies of river corridor exchange have been conducted at scales ranging from tens to hundreds of meters, results of these studies are used to predict their ecological and hydrological influences at the scale of river networks. Further complicating prediction, exchanges are expected to vary with hydrologic forcing and the local geomorphic setting. While we desire predictive power, we lack a complete spatiotemporal relationship relating discharge to the variation in geologic setting and hydrologic forcing that is expected across a river basin. Indeed, the conceptual model of Wondzell (2011) predicts systematic variation in river corridor exchange as a function of (1) variation in baseflow over time at a fixed location, (2) variation in discharge with location in the river network, and (3) local geomorphic setting. To test this conceptual model we conducted more than 60 solute tracer studies including a synoptic campaign in the 5th-order river network of the H. J. Andrews Experimental Forest (Oregon, USA) and replicate-in-time experiments in four watersheds. We interpret the data using a series of metrics describing river corridor exchange and solute transport, testing for consistent direction and magnitude of relationships relating these metrics to discharge and local geomorphic setting. We confirmed systematic decrease in river corridor exchange space through the river networks, from headwaters to the larger main stem. However, we did not find systematic variation with changes in discharge through time or with local geomorphic setting. While interpretation of our results is complicated by problems with the analytical methods, the results are sufficiently robust for us to conclude that space-for-time and time-for-space substitutions are not appropriate in our study system. Finally, we suggest two strategies that will improve the interpretability of tracer test results and help the hyporheic community develop robust datasets that will enable comparisons across multiple sites and/or discharge conditions.

scholarly journals Cold tolerance of mountain stoneflies (Plecoptera: Nemouridae) from the high Rocky Mountains

2020 ◽  
Author(s):  
Scott Hotaling ◽  
Alisha A. Shah ◽  
Michael E. Dillon ◽  
J. Joseph Giersch ◽  
Lusha M. Tronstad ◽  
...  
Keyword(s):  
Climate Change ◽  
Cold Tolerance ◽  
Rocky Mountains ◽  
High Elevation ◽  
Mountain Stream ◽  
Cold Temperatures ◽  
Thermal Limits ◽  
Late Instar ◽  
Stream Biodiversity ◽  
Common Association

ABSTRACTHow aquatic insects cope with cold temperatures is poorly understood. This is particularly true for high-elevation species that often experience a seasonal risk of freezing. In the Rocky Mountains, nemourid stoneflies (Plecoptera: Nemouridae) are a major component of mountain stream biodiversity and are typically found in streams fed by glaciers and snowfields, which due to climate change, are rapidly receding. Predicting the effects of climate change on mountain stoneflies is difficult because their thermal physiology is largely unknown. We investigated cold tolerance of several alpine stoneflies (Lednia tumana, Lednia tetonica, and Zapada spp.) from the Rocky Mountains, USA. We measured the supercooling point (SCP) and tolerance to ice enclosure of late-instar nymphs collected from a range of thermal regimes. SCPs varied among species and populations, with the lowest SCP measured for nymphs from an alpine pond, which is much more likely to freeze solid in winter than flowing streams. We also show that L. tumana cannot survive being enclosed in ice, even for short periods of time (less than three hours) at relatively mild temperatures (−0.5 °C). Our results indicate that high-elevation stoneflies at greater risk of freezing may have correspondingly lower SCPs, and despite their common association with glacial meltwater, they appear to be living near their lower thermal limits.

Stoneflies in the genus Lednia (Plecoptera: Nemouridae): sentinels of climate change impacts on mountain stream biodiversity

2022 ◽  
Author(s):  
Matthew D. Green ◽  
Lusha M. Tronstad ◽  
J. Joseph Giersch ◽  
Alisha A. Shah ◽  
Candace E. Fallon ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Change Impacts ◽  
Mountain Stream ◽  
Stream Biodiversity

scholarly journals Study On “The Delayed In Intervention Of ‘Science’ In Climate Change Solution(S), Clutching The Sustainability Of Species Life” On Earth By Averting Weather Like Mars”

2020 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Climate Change ◽  
Sustainable Development ◽  
Environmental Changes ◽  
Network Connectivity ◽  
Local Climate ◽  
The Sustainable Development ◽  
Ice Caps ◽  
Metabolic Functions ◽  
Development Goals ◽  
Food Commodities

Billion years ago, planet Earth was round rock ball in shape; with radius value ranges from 6,378 km (3,963 mi) at the equator to 6,357 km (3,950 mi) at a pole. Because of it’s orbit motion around sun, the livelihood conditions of first generation humans and their beings (Flora & Fauna) malformed at small corner. As the generations’ ephemeral, the earth provided liveable space at various spots like forest, hill stations, ice caps (Glaciers), islands etc....and distributed communities’ culture with several modifications. When generations were passing on, the traditions and culture developed by different communities according to their availability of food commodities & elements framed by heads of that regime (Carboniferous period, dinosaurs and mammals etc...), which turned the spurring change of local climate with “icehouse” to “hothouse”. The survival of above communities is under nature (Climate) atmosphere metabolic functions between Ozone and Crust by using sun rays for Photosynthesis. The maximum part of Earth was covered with snow and water (Ocean), less part is earth (Crust), where maximum creature’s lives. After industrialisation, the swift changes in mechanism (Engineering) development mark crossed oceans, forest (hill stations), islands.... and buried several ruling histories with exploited community’s population, which demanded proper network connectivity under Globalisation and Sustainable Development. Today the development mark stagnated at every corner and emitting (garbage or Waste Disposals or Air) pollutants at all angles on this planet. This is lead to Environmental changes or Global Warming or Climate Change. These changes are drastically impacting not only on the surface of Earth, but also embryonic catastrophes from upper mantle connected surfaces. This paper elevates the avocation of Earth like Mars (Other Planet) with devastation made by climate change consequences. Also, the emergency of “execute the solution(s) to reconciliation of “ Species Life Science (Anatomy)” sustainability in the economies before finishing the Sustainable Development Goals (SDGs) period i.e. 2030.

scholarly journals Aquatic food webs will need to stand on giants’ shoulders

2019 ◽  
Vol 31 ◽  
Author(s):  
Ronaldo Angelini
Keyword(s):  
Food Webs ◽  
High Mobility ◽  
Network Connectivity ◽  
Generalist Predator ◽  
Stream Network ◽  
Generalist Species ◽  
Aquatic Food Webs ◽  
Top Predators ◽  
Aquatic Food ◽  
Secondary Consumers

Abstract Aquatic food webs have been especially impacted in the last thirty years. This is particularly true for trophic webs with Mobile Generalist Species (MGS), which are species with high mobility (movement and dispersal) and flexibility in both foraging and habitat use. In general, MGS are large-sized species with the ability to move long distances, and they may be top predators (Large Generalist Predator; LGP) or feed lower in the food web than predicted from their size (Giant Secondary Consumers; GSCs). These species groups will play a fundamental role in connecting and rewiring human-impacted food webs, however this may be challenging because the stream network connectivity in most of the world’s largest river basins has been severely fragmented by dams.

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