Author: Katherine Emerson WebsterPublisher:
ISBN:
Category :
Languages : en
Pages : 388
Book Description
Responses of Lakes to Drought
Author: Katherine Emerson WebsterPublisher:
ISBN:
Category :
Languages : en
Pages : 388
Book Description
Drought and Aquatic Ecosystems
Author: P. Sam LakePublisher: John Wiley & Sons
ISBN: 1444341790
Category : Science
Languages : en
Pages : 458
Book Description
Droughts are a major hazard to both natural and human-dominated environments and those, especially of long duration and high intensity, can be highly damaging and leave long-lasting effects. This book describes the climatic conditions that give rise to droughts, and their various forms and chief attributes. Past droughts are described including those that had severe impacts on human societies. As a disturbance, droughts can be thought of as “ramps” in that they usually build slowly and take time to become evident. As precipitation is reduced, flows from catchments into aquatic systems decline. As water declines in water bodies, ecological processes are changed and the biota can be drastically reduced, though species and populations may survive by using refuges. Recovery from drought varies in both rates and in degrees of completeness and may be a function of both refuge availability and connectivity. For the first time, this book reviews the available rather scattered literature on the impacts of drought on the flora, fauna and ecological processes of aquatic ecosystems ranging from small ponds to lakes and from streams to estuaries. The effects of drought on the biota of standing waters and flowing waters and of temporary waters and perennial systems are described and compared. In addition, the ways in which human activity can exacerbate droughts are outlined. In many parts of the world especially in the mid latitudes, global warming may result in increases in the duration and intensity of droughts. Drought and Aquatic Ecosystems is essential reading for freshwater ecologists, water resource managers and advanced students.
Ecological Effects of Water-level Fluctuations in Lakes
Author: Karl M. WantzenPublisher: Springer Science & Business Media
ISBN: 1402091923
Category : Technology & Engineering
Languages : en
Pages : 184
Book Description
Most aquatic ecosystems have variable water levels. These water-level fluctuations (WLF) have multiple effects on the organisms above and below the waterline. Natural WLF patterns in lakes guarantee both productivity and biodiversity, while untimely floods and droughts may have negative effects. Human impacts on WLF have led to a stabilization of the water levels of many lakes by hydraulic regulation, untimely drawdown due to water use, or floods due to water release from hydropower plants in the catchments. This book provides a first review in this field. It presents selected papers on the ecological effects of WLF in lakes, resulting from a workshop at the University of Konstanz in winter 2005. Issues addressed here include the extent of WLF, and analyses of their effects on different groups of biota from microorganisms to vertebrates. Applied issues include recommendations for the hydrological management of regulated lakes to reduce negative impacts, and a conceptual framework is delivered by an extension of the floodpulse concept for lakes. Current impacts on water use, including increasing demands on drinking and irrigation water, hydropower etc., and climate change effects on WLF make this book an essential resource for aquatic ecologists, engineers, and decision-makers dealing with the management of lake ecosystems and their catchments.
Long-term Dynamics of Lakes in the Landscape
Author: John J. MagnusonPublisher: Oxford University Press, USA
ISBN: 9780195136906
Category : Nature
Languages : en
Pages : 426
Book Description
"Two whole lake experiments are describes : experimental acidification at Little Rock Lake and the response of Lake Mendota to a natural experiment involving agricultural and urban development. Readers will learn the benefits of doing long-term ecological research, and limnologists will discover the richness of new information derived from studying suites of neighboring lakes across time."--BOOK JACKET.
Euston Lakes Drought Monitoring
Author: Response of Three Populus Species to Drought
Author: Terry F. StrongPublisher:
ISBN:
Category : Aspen
Languages : en
Pages : 12
Book Description
Drought Prediction, Preparation, and Response
Author: United States. Congress. House. Committee on SciencePublisher:
ISBN:
Category : Nature
Languages : en
Pages : 88
Book Description
Detecting and predicting the responses of lakes to global climate change
Author: U. GaedkeSurviving the Drought
Author: Evaluation of the FAO response to the crisis in the Lake Chad Basin 2015‒2018
Author: Food and Agriculture Organization of the United Nations Publisher: Food & Agriculture Org.
ISBN: 9251339066
Category : Technology & Engineering
Languages : en
Pages : 82
Book Description
Forty-nine million people live in the Lake Chad region, exploiting its rich natural resources and relatively constant supply of water, fodder and fertile land all year round. The area used to be a food production hub, with local markets supplying produce to Cameroon, Chad, the Niger and Nigeria. However, poor natural resource management, poor coordination across the different countries of the region, and the widespread impact of climate change have contributed to the significant deterioration of the Lake’s natural ecosystem capacity. Agricultural soils and pastures have been widely degraded, leading to a huge reduction in food productivity and, thus, job opportunities, especially for the youth living in rural areas who account for a high percentage of the population. Conflicts and tensions have created a conducive context for young people in search of income and opportunities to join the Boko Haram terrorist movement originated in Nigeria. This evaluation was conducted to address FAO’s response to the Lake Chad Basin crisis, including interventions conducted in 2015‒2018, as FAO published the Lake Chad Basin Crisis Response Strategy (2017–2019) to address the needs of the identified 6.9 million people affected by soaring food insecurity in the Lake Chad Basin in early 2017. The objectives of this evaluation were to analyse FAO’s responses to the crisis at operating level, with a focus on efficiency, effectiveness and sustainability, while assessing the relevance and consistency of the regional approach from a strategic perspective. The evaluation team visited many of the areas concerned, and at the end of each visit they organized a debriefing session with the respective FAO country team to share information gathered and collect complementary data and analysis to inform its deliberations. This helped to ensure transparency in the data collection process and to maximize the learning process. For FAO to support the food security and nutrition of communities in the Lake Chad region effectively, a regional strategy focused on supporting the resilience of communities is relevant and appropriate. Complementary to FAO’s country-based programmes, a regional strategy bears the potential to devise interventions that adapt to the cross-border nature of issues that each country faces and would allow supporting a more cohesive and collaborative way of working. Based on the Regional Response Strategy (2017–2019), FAO should revise its strategy and approach by incorporating governmental objectives, and translate it into an operational action plan, in line with other partners’ strategies in the region.