Results 41 to 50 of about 1,603 (198)

Principal response curves technique for the analysis of multivariate biomonitoring time series [PDF]

open access: yes
Although chemical and biological monitoring is often used to evaluate the quality of surface waters for regulatory purposes and/or to evaluate environmental status and trends, the resulting biological and chemical data sets are large and difficult to ...
Besten, P.J., den   +3 more
core   +2 more sources

A phylogeographic analysis of the North American medicinal leech, Macrobdella decora (Say, 1824)

open access: yesZoologica Scripta, Volume 54, Issue 1, Page 103-118, January 2025.
Abstract In spite of their important roles in many ecosystems, data regarding population structure and biogeographic patterns of leeches are scarce. To begin to address this knowledge gap, we herein perform a phylogeographic analysis of the North American medicinal leech, Macrobdella decora (Say, 1824). A total of 224 M. decora specimens were collected
Nat Kennedy   +5 more
wiley   +1 more source

Charles Darwin′s Observations on the Behaviour of Earthworms and the Evolutionary History of a Giant Endemic Species from Germany, Lumbricus badensis (Oligochaeta: Lumbricidae)

open access: yesApplied and Environmental Soil Science, Volume 2010, Issue 1, 2010., 2010
The British naturalist Charles Darwin (1809–1882) began and ended his almost 45‐year‐long career with observations, experiments, and theories related to earthworms. About six months before his death, Darwin published his book on The Formation of Vegetable Mould, through the Actions of Worms, With Observations on their Habits (1881).
U. Kutschera   +2 more
wiley   +1 more source

Provisional atlas of the freshwater leeches of the British Isles [PDF]

open access: yes, 1981
Distribution maps were included in the second edition of the F.B.A. Scientific Publication on British freshwater leeches (Mann 1964). When that publication was extensively revised and enlarged to include a review of the literature on the ecology of ...
Elliott, J.M., Tullet, P.A.
core  

Insights into the distribution of Freshwater Leeches (Annelida, Clitellata, Hirudinea) in Southwestern Tunisia

open access: yesJournal of Oasis Agriculture and Sustainable Development
The study aims to highlight the diversity of leech species living in southwestern Tunisia. Our study highlights the prevalence of Limnatis nilotica, which represents 63.01% of the leech population, while the less frequently observed species include ...
Ichrak Khaled, Issam Saidi
doaj   +1 more source

An Invasive Predator Substantially Alters Energy Flux Without Changing Food Web Functional State or Stability

open access: yesAquatic Conservation: Marine and Freshwater Ecosystems, Volume 34, Issue 9, September 2024.
ABSTRACT Understanding how invasive species affect the stability and function of ecosystems is critical for conservation. Here, we quantified the effect of an actively suppressed invasive species on the Yellowstone Lake ecosystem using a food web energetics approach.
Hayley C. Glassic   +9 more
wiley   +1 more source

Assessment of Land‐Use Impact on Macroinvertebrate Communities in the Zwalm River Basin (Flanders, Belgium) Using Multivariate Analysis and Geographic Information Systems

open access: yesThe Scientific World Journal, Volume 2, Issue 1, Page 546-557, 2002., 2002
Relationships between land‐use and river water quality assessed by means of biological and physical‐chemical variables and habitat characteristics were analysed for the Zwalm River basin in Flanders (Belgium). The research focussed on three zones within this river basin, each characterized by different land uses, and consequently, different types of ...
Veronique Adriaenssens   +2 more
wiley   +1 more source

Phylogeny and revision of Erpobdelliformes (Annelida, Arhynchobdellida) from Mexico based on nuclear and mithochondrial gene sequences. Filogenia y revisión de los Erpobdelliformes (Annelida, Arhynchobdellida) de México, con base en secuencias de ADN nuclear y mitocondrial

open access: yesRevista Mexicana de Biodiversidad, 2005
The phylogenetic relationships of the suborder Erpobdelliformes, a group of non-sanguivorous leeches, were investigated with the use of mitochondrial cytochrome c oxidase subunit I, mitochondrial 12S rDNA and nuclear 18S rDNA.
Alejandro Oceguera-Figueroa   +2 more
doaj  

Survey of the lesser silver water beetle Hydrochara caraboides in Cheshire [PDF]

open access: yes, 1997
This is the report on the Survey of the Lesser Silver Water Beetle Hydrochara caraboides in Cheshire 1997 by the English Nature Research Reports. The three surveyed areas were the ponds at Reaseheath, Mickle Trafford and Brookhouse Farm. The report goes
Guest, Jonathan
core  

Structural Characterization of a Diuretic Peptide from the Central Nervous System of the Leech Erpobdella octoculata

open access: yesJournal of Biological Chemistry, 1995
Purification of a material immunoreactive to an antiserum against angiotensin II and present in the central nervous system of the pharyngobdellid leech Erpobdella octoculata was performed by reversed-phase high pressure liquid chromatography combined ...
M. Salzet   +4 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy