scholarly journals Refuges and ecological traps: Extreme drought threatens persistence of an endangered fish in intermittent streams

2020 ◽  
Vol 26 (7) ◽  
pp. 3834-3845
Author(s):  
Ross Vander Vorste ◽  
Mariska Obedzinski ◽  
Sarah Nossaman Pierce ◽  
Stephanie M. Carlson ◽  
Theodore E. Grantham
Keyword(s):  
Extreme Drought ◽  
Intermittent Streams ◽  
Endangered Fish

4Flowering Responses of Alpine Meadow Plant in the Qinghai-Tibetan Plateau to Extreme Drought Imposed in Different Periods

2013 ◽  
Vol 19 (2) ◽  
pp. 272-279 ◽  
Author(s):  
Chengxiang MOU ◽  
Geng SUN ◽  
Peng LUO ◽  
Zhiyuan WANG ◽  
Guangrong LUO
Keyword(s):  
Tibetan Plateau ◽  
Alpine Meadow ◽  
Extreme Drought

scholarly journals Root carbon and nutrient homeostasis determines downy oak sapling survival and recovery from drought

2021 ◽  
Author(s):  
Sheng-Nan Ouyang ◽  
Arthur Gessler ◽  
Matthias Saurer ◽  
Frank Hagedorn ◽  
De-Cai Gao ◽  
...  
Keyword(s):  
Soluble Sugar ◽  
Recovery Process ◽  
Extreme Drought ◽  
Tree Level ◽  
Starch Degradation ◽  
Minor Role ◽  
Climate Conditions ◽  
Physiological Processes ◽  
Drought Relief ◽  
A Minor

Abstract The role of carbon (C) and nutrient uptake, allocation, storage and especially their interactions in survival and recovery of trees under increased frequencies and intensities of drought events is not well understood. A full factorial experiment with four soil water content regimes ranging from extreme drought to well-watered conditions and two fertilization levels was carried out. We aimed to investigate whether nutrient addition mitigates drought effects on downy oak (Quercus pubescens Willd.) and whether storage pools of non-structural carbohydrates (NSC) are modified to enhance survival after 2.5 years of drought and recovery after drought relief. Physiological traits, such as photosynthesis, predawn leaf water potential as well as tissue biomass together with pools and dynamics of NSC and nutrients at the whole-tree level were investigated. Our results showed that fertilization played a minor role in saplings’ physiological processes to cope with drought and drought relief, but reduced sapling mortality during extreme drought. Irrespective of nutrient supply, Q. pubescens showed increased soluble sugar concentration in all tissues with increasing drought intensity, mostly because of starch degradation. After 28 days of drought relief, tissue sugar concentrations decreased, reaching comparable values to those of well-watered plants. Only during the recovery process from extreme drought, root NSC concentration strongly declined, leading to an almost complete NSC depletion after 28 days of rewetting, simultaneously with new leaves flushing. These findings suggest that extreme drought can lead to root C exhaustion. After drought relief, the repair and regrowth of organs can even exacerbate the root C depletion. We concluded that under future climate conditions with repeated drought events, the insufficient and lagged C replenishment in roots might eventually lead to C starvation and further mortality.

scholarly journals Impact of Extreme Drought Climate on Water Security in North Borneo: Case Study of Sabah

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1135
Author(s):  
Carolyn Payus ◽  
Lim Ann Huey ◽  
Farrah Adnan ◽  
Andi Besse Rimba ◽  
Geetha Mohan ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Resource ◽  
Supply And Demand ◽  
Water Security ◽  
Water Levels ◽  
Extreme Drought ◽  
Northeast Monsoon ◽  
Water Insecurity ◽  
The North ◽  
North Borneo

For countries in Southeast Asia that mainly rely on surface water as their water resource, changes in weather patterns and hydrological systems due to climate change will cause severely decreased water resource availability. Warm weather triggers more water use and exacerbates the extraction of water resources, which will change the operation patterns of water usage and increase demand, resulting in water scarcity. The occurrence of prolonged drought upsets the balance between water supply and demand, significantly increasing the vulnerability of regions to damaging impacts. The objectives of this study are to identify trends and determine the impacts of extreme drought events on water levels for the major important water dams in the northern part of Borneo, and to assess the risk of water insecurity for the dams. In this context, remote sensing images are used to determine the degree of risk of water insecurity in the regions. Statistical methods are used in the analysis of daily water levels and rainfall data. The findings show that water levels in dams on the North and Northeast Coasts of Borneo are greatly affected by the extreme drought climate caused by the Northeast Monsoon, with mild to the high risk recorded in terms of water insecurity, with only two of the water dams being water-secure. This study shows how climate change has affected water availability throughout the regions.

The Goldilocks effect: intermittent streams sustain more plant species than those with perennial or ephemeral flow

2011 ◽  
Vol 57 (3) ◽  
pp. 467-480 ◽  
Author(s):  
GABRIELLE L. KATZ ◽  
MICHAEL W. DENSLOW ◽  
JULIET C. STROMBERG
Keyword(s):  
Plant Species ◽  
Intermittent Streams

Environmental DNA monitoring method of the commercially important and endangered fish Gnathopogon caerulescens

Limnology ◽  
2021 ◽  
Author(s):  
Kimiko Uchii ◽  
Kei Wakimura ◽  
Takeshi Kikko ◽  
Ryuji Yonekura ◽  
Riho Kawaguchi ◽  
...  
Keyword(s):  
Environmental Dna ◽  
Monitoring Method ◽  
Endangered Fish ◽  
Gnathopogon Caerulescens ◽  
Commercially Important

Warming increased bark beetle‐induced tree mortality by 30% during an extreme drought in California

2021 ◽  
Author(s):  
Zachary J. Robbins ◽  
Chonggang Xu ◽  
Brian H. Aukema ◽  
Polly C. Buotte ◽  
Rutuja Chitra‐Tarak ◽  
...  
Keyword(s):  
Bark Beetle ◽  
Tree Mortality ◽  
Extreme Drought
Sign in / Sign up

Export Citation Format

Share Document