Spatial and Temporal Variability of Benthic Macroinvertebrates in Running Waters PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Spatial and Temporal Variability of Benthic Macroinvertebrates in Running Waters PDF full book. Access full book title Spatial and Temporal Variability of Benthic Macroinvertebrates in Running Waters by Leonard Sandin. Download full books in PDF and EPUB format.
Author: Leonard Sandin
Publisher:
ISBN:
Category :
Languages : en
Pages : 68
Get Book Here
Book Description
Author: Leonard Sandin
Publisher:
ISBN:
Category :
Languages : en
Pages : 68
Get Book Here
Book Description
Author: Leonard Sandin
Publisher:
ISBN:
Category : Benthos
Languages : en
Pages : 180
Get Book Here
Book Description
Author: 梁士倫
Publisher:
ISBN: 9781374784642
Category :
Languages : en
Pages :
Get Book Here
Book Description
This dissertation, "Scale-dependent Effects of Spatial and Temporal Variability on Benthic Macroinvertebrate Communities in Hong Kong Streams" by 梁士倫, Sze-lun, Leung, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3124331 Subjects: Freshwater invertebrates - China - Hong Kong Water quality biological assessment - China - Hong Kong Rivers - Environmental aspects - China - Hong Kong
Author: Daniel Hering
Publisher: Springer Science & Business Media
ISBN: 9400709935
Category : Science
Languages : en
Pages : 381
Get Book Here
Book Description
This book provides the focal point of the European Water Framework Directive. offering insight into principles and methodologies of river assessment, covering the whole range from the definition of river typologies to specific problems such as the most appropriate taxonomic resolution and software applications. The text focuses on benthic macroinvertebrates, the taxonomic group most frequently used in bioassessment.
Author: Jennifer Lento
Publisher:
ISBN:
Category : Acid pollution of rivers, lakes, etc
Languages : en
Pages : 392
Get Book Here
Book Description
Author: Eve Elizabeth O'Connor
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
The structure and composition of benthic macroinvertebrate communities can vary spatially and over time. Spatial and temporal variation along a stream has many implications for population and community dynamics, which may influence bioassessment programs. I examined variability in the benthic community of eight streams within the Polecat Creek, Virginia watershed. These streams vary in size from 1st to 4th order. The streams were sampled once every season for eleven years using standard bioassessment protocols. Macroinvertebrates were sampled from both sediment and submerged wood habitats at each site. The coefficient of variation (CV) was used to quantify among season, among year and among site variability of eight community metrics from both the sediment and wood samples. ANOVAs were calculated using Tukey post-hoc test to determine if there were statistically significant differences in taxonomic richness and mean CV values across seasons, years and sites for both sediment and wood samples. Sorenson's Quotient of Similarity was used to examine the extent of differences in the taxonomic composition of the macroinvertebrate communities among the four seasons over the 11 years of the study and among the 8 sampling sites. A high amount of variability was observed among seasons, sites and years. A wide range of CV values was observed among community metrics, with certain metrics exhibiting low overall mean CV values and others exhibiting very high overall mean CV values. It is important to understand the temporal and spatial variability of macroinvertebrates when planning biomonitoring programs.
Author: Natalie Stauffer-Olsen Janelle
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
Get Book Here
Book Description
An understanding of the spatial and temporal diversity of benthic invertebrates is necessary to understand, manage, and protect freshwater habitats. Benthic invertebrates are important components of aquatic ecosystems and are frequently used in bioassessment and biomonitoring programs. Benthic invertebrates can also play a role in nutrient cycling in lentic environments through bioturbation activities. This dissertation uses a range of techniques and analyses to understand the arrangement of benthic invertebrate diversity in Upper Klamath Lake, Oregon, and several watersheds in northern southern California. Upper Klamath Lake (UKL) is a large, shallow, naturally eutrophic lake that has experienced declines in water quality, which has led to annual cyanobacterial blooms of Aphanizomenon flos-aquae. Benthic invertebrates can increase autochthonous nutrient cycling through benthic bioturbation activities. In order to better understand the role that benthic invertebrates play in UKL, I studied the density, taxonomic richness, and species composition of benthic invertebrate assemblages in three geographic regions (north, central, and south) and three habitats (littoral, open-water and trench) across UKL. I also characterized sediment composition and water quality at each collection site and determined which environmental variables correlated with differences in benthic invertebrate composition. This research is located in Chapters 1 and 3 of this dissertation. Like benthic invertebrates in UKL, the mayfly Baetis tricaudatus is an abundant and ecologically important organism of freshwater ecosystems. Despite its widespread distribution, B. tricaudatus cannot be consistently and accurately identified and belongs to a species group known to have cryptic species diversity. While previous studies have examined the spatial distribution of this diversity, none have studied the temporal distribution. To better understand the temporal arrangement of diversity at the cytochrome oxidase subunit 1 (CO1) mitochondrial gene region, I collected B. tricaudatus specimens from 3 sites over 4 years and used haplotype networks to visualize diversity. Because my results were different than those from other studies on the same taxon, for my final chapter I analyzed Baetis rhodani group COI sequences from northern and southern California using Bayesian phylogenetic analyses and haplotype networks. This research contributes to our understanding of genetic diversity, which is an important component to biodiversity.
Author: Sze-lun Leung
Publisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 530
Get Book Here
Book Description
Author: M. Jungwirth
Publisher: Springer Science & Business Media
ISBN: 9401141649
Category : Technology & Engineering
Languages : en
Pages : 491
Get Book Here
Book Description
The assessment of the ecological integrity of running waters is a prerequisite to an understanding of the effects of human alterations. The evaluation of degradation processes provides key information on how to avoid further negative impacts. The success of future conservation, mitigation and restoration activities will rely on sound assessment methodologies and their ecological relevance and applicability. Assessment methodologies are therefore an integral part of sustainable river management. This book synthesizes and discusses state-of-the-art experiences in assessment methodologies. Including the latest knowledge on structures, processes and functions of running waters as a fundamental basis for developing adequate assessment methods, the book focuses on method development, application, and in particular on integrated assessment methods. This book is directed at scientists and managers with the aim of more effective preservation, restoration and maintenance of the ecological integrity of running water ecosystems.
Author: P. Ponmurugan
Publisher: Cambridge Scholars Publishing
ISBN: 1527548597
Category : Nature
Languages : en
Pages : 220
Get Book Here
Book Description
Biodiversity is among the richest treasures of the earth. Despite their small size, microbes play a vital role in environmental monitoring and making the earth sustainable. Microorganisms preserve and assist plants and animals o either directly or indirectly, and, due to their omnipresence in nature, they inhabit conditions such as extreme temperatures, water, soil, salt, medical wastes, agricultural wastes, and air. Microbes are also important in human culture and play an essential role in existence of life. They are present in food fermentation, sewage treatment, medical, agricultural, and soil waste, antibiotics, soil fertility, model organisms, and human microbiota, aid with decomposition, and are responsible for infectious diseases. This volume represents an important contribution to the field, highlighting the importance of microbial biodiversity to society.
