scholarly journals A review of river habitat characterisation methods: indices vs. characterisation protocols

Limnetica ◽  
2011 ◽  
Vol 30 (2) ◽  
pp. 217-234
Author(s):  
Diego Fernández ◽  
José Barquín ◽  
Paul J. Raven
Keyword(s):  
River Habitat ◽  
Habitat Characterisation ◽  
Characterisation Methods

scholarly journals Fish community responses and the temporal dynamics of recovery following river habitat restorations in Europe

2015 ◽  
Vol 34 (3) ◽  
pp. 975-990 ◽  
Author(s):  
Gregor Thomas ◽  
Armin W. Lorenz ◽  
Andrea Sundermann ◽  
Peter Haase ◽  
Armin Peter ◽  
...  
Keyword(s):  
Fish Community ◽  
Temporal Dynamics ◽  
Community Responses ◽  
River Habitat

scholarly journals GAKTpore: Stereological Characterisation Methods for Porous Foams in Biomedical Applications

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1269
Author(s):  
Gareth Sheppard ◽  
Karl Tassenberg ◽  
Bogdan Nenchev ◽  
Joel Strickland ◽  
Ramy Mesalam ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Biomedical Applications ◽  
Large Scale ◽  
Collagen Scaffold ◽  
Porous Structures ◽  
Tissue Engineering Scaffolds ◽  
Biological Responses ◽  
Sem Micrograph ◽  
Cell Adhesion And Proliferation ◽  
Characterisation Methods

In tissue engineering, scaffolds are a key component that possess a highly elaborate pore structure. Careful characterisation of such porous structures enables the prediction of a variety of large-scale biological responses. In this work, a rapid, efficient, and accurate methodology for 2D bulk porous structure analysis is proposed. The algorithm, “GAKTpore”, creates a morphology map allowing quantification and visualisation of spatial feature variation. The software achieves 99.6% and 99.1% mean accuracy for pore diameter and shape factor identification, respectively. There are two main algorithm novelties within this work: (1) feature-dependant homogeneity map; (2) a new waviness function providing insights into the convexity/concavity of pores, important for understanding the influence on cell adhesion and proliferation. The algorithm is applied to foam structures, providing a full characterisation of a 10 mm diameter SEM micrograph (14,784 × 14,915 px) with 190,249 pores in ~9 min and has elucidated new insights into collagen scaffold formation by relating microstructural formation to the bulk formation environment. This novel porosity characterisation algorithm demonstrates its versatility, where accuracy, repeatability, and time are paramount. Thus, GAKTpore offers enormous potential to optimise and enhance scaffolds within tissue engineering.

scholarly journals Urban Rivers Corridors in the Don Catchment, UK: From Ignored, Ignoble and Industrial to Green, Seen and Celebrated

2021 ◽  
Vol 13 (14) ◽  
pp. 7646
Author(s):  
Ed Shaw ◽  
Debbie Coldwell ◽  
Anthony Cox ◽  
Matt Duffy ◽  
Chris Firth ◽  
...  
Keyword(s):  
Industrial Revolution ◽  
Urban River ◽  
Urban Rivers ◽  
River Habitat ◽  
Negative Perceptions ◽  
High Degree ◽  
River Corridors ◽  
Advance Knowledge ◽  
Ecological Recovery

Research on urban rivers often seeks to find commonalities to advance knowledge of the effect of urbanisation on rivers, and rightly so. But it is important, also, to develop a complementary understanding of how urban rivers can be distinct, to facilitate a more nuanced view of concepts such as the ‘urban river syndrome’ and of the challenges facing those who wish to create more sustainable urban river corridors. To this end we use the Don Catchment as a case study to illustrate how historic patterns of urbanisation have been fundamental in shaping the catchment’s rivers. Following the Industrial Revolution, the catchment became an industrial centre, resulting in the ecological death of river ecosystems, and the disconnection of communities from stark urban river corridors. Widescale deindustrialisation in the 1970s and 1980s then resulted in a partial ecological recovery of the rivers, and ignited public interest. This history has imbued the catchment’s urban river corridors with a distinctive industrial character that can vary greatly between and within settlements. It has also left a legacy of particular issues, including a high degree of river habitat fragmentation and physical modification, and of negative perceptions of the rivers, which need improving to realise their potential as assets to local communities.

scholarly journals Evaulation of the Quality of an Aquatic Habitat on the Drietomica River

2014 ◽  
Vol 22 (1) ◽  
pp. 43-48
Author(s):  
Ivan Stankoci ◽  
Jana Jariabková ◽  
Viliam Macura
Keyword(s):  
Salmo Trutta ◽  
Ecological Status ◽  
Aquatic Habitat ◽  
Main Step ◽  
Northwestern Part ◽  
River Habitat ◽  
Habitat Simulation ◽  
Brown Trout Salmo Trutta ◽  
The One

Abstract The ecological status of a river is influenced by many factors, of which the most important are fauna and flora; in this paper they are defined as a habitat. During the years 2004, 2005, 2006 and 2011, research on the hydroecological quality of a habitat was evaluated in the reference section of the Drietomica River. Drietomica is a typical representative river of the Slovak flysch area and is located in the region of the White Carpathians in the northwestern part of Slovakia. In this article the results of modeling a microhabitat by means of the Instream Flow Incremental Methodology (IFIM) are presented. For the one-dimensional modeling, the River Habitat Simulation System (RHABSIM) was used to analyse the interaction between a water flow, the morphology of a riverbed, and the biological components of the environment. The habitat ´s hydroecological quality was evaluated after detailed ichthyological, topographical and hydro-morphological surveys. The main step was assessing the biotic characteristics of the habitat through the suitability curves for the Brown trout (Salmo trutta m. fario). Suitability curves are a graphic representation of the main biotic and abiotic preferences of a microhabitat´s components. The suitability curves were derived for the depth, velocity, fish covers and degree of the shading. For evaluating the quality of the aquatic habitat, 19 fish covers were closely monitored and evaluated. The results of the Weighted Usable Area (WUA = f (Q)) were evaluated from a comprehensive assessment of the referenced reach of the Drietomica River.

scholarly journals First measurements with the new 3He-filled Monoblock Aluminium Multitube neutron detector developed at the ILL for ANSTO PLATYPUS reflectometer

2020 ◽  
pp. 1-15
Author(s):  
Luis Abuel ◽  
Friedl Bartsch ◽  
Andrew Berry ◽  
Jean-Claude Buffet ◽  
Sylvain Cuccaro ◽  
...  
Keyword(s):  
Research Collaboration ◽  
Detection Efficiency ◽  
Mechanical Design ◽  
Performance Parameters ◽  
Detector Performance ◽  
High Detection ◽  
Neutron Wavelength ◽  
High Detection Efficiency ◽  
Main Detector ◽  
Characterisation Methods

A detector upgrade was carried out on the PLATYPUS instrument dedicated to neutron reflectometry at the Australian Nuclear Science and Technology Organisation (ANSTO). The new detector, developed in the framework of a research collaboration between the ILL and ANSTO, is based on the Monoblock Aluminium Multi-tube (MAM) detector design already in use on several reflectometers and SANS instruments at the ILL. This article provides a technical description of the mechanical design and read-out electronics of the PLATYPUS detector and its commissioning on the PLATYPUS instrument. The main detector performance parameters have been measured and are presented here as well as the characterisation methods and the results of several reflectometry measurements. These measurements show an improvement in experimental data quality resulting from high positional resolution, high detection efficiency and reduced neutron scattering background in the 2.5–19 Å neutron wavelength range used in PLATYPUS instrument.

BENCHMARKING RIVER HABITAT IMPROVEMENT

2011 ◽  
Vol 28 (10) ◽  
pp. 1768-1779 ◽  
Author(s):  
I. Boavida ◽  
J. M. Santos ◽  
R. Cortes ◽  
A. Pinheiro ◽  
M. T. Ferreira
Keyword(s):  
River Habitat ◽  
Habitat Improvement

scholarly journals Stan hydromorfologiczny górnego odcinka rzeki Ner w świetle zastosowania metody River Habitat Survey (RHS)

2016 ◽  
Author(s):  
Joanna Szymkiewicz ◽  
Juliusz Twardy
Keyword(s):  
River Habitat ◽  
River Habitat Survey

Latem 2014 roku zbadano przy wykorzystaniu metody River Habitat Survey (RHS) stan hydromorfologiczny górnego odcinka rzeki Ner. Posługiwanie się wymienioną metodą polega na przeprowadzeniu badań terenowych na wytypowanych odcinkach rzek. Podczas badań terenowych w specjalnych formularzach zbiera się kilkaset jakościowych i ilościowych parametrów dotyczących zarówno koryta rzecznego, jak i dna dolinnego, a także roślinności, użytkowania ziemi, budowli hydrotechnicznych itp. Zebrane dane pozwalają obliczyć dwa syntetyczne wskaźniki hydromorfologiczne, na podstawie których określa się klasę stanu hydromorfologicznego badanego odcinak rzeki. Do badań wybrano trzy odcinki: najwyższy odcinek Huta Wiskicka (I), następnie leżący niżej odcinek Gadka Stara (II) i odcinek najniższy – Lublinek (III). Odcinki badawcze I i II były położone poza granicami administracyjnymi Łodzi, natomiast odcinek III znajdował się w granicach miasta. Uzyskano umiarkowane i stosunkowo słabe oceny stanu hydromorfologicznego górnego odcinka Neru: odcinek najwyższy cechował stan słaby (klasa IV), odcinek środkowy miał stan umiarkowany (klasa III), a odcinek najniższy – stan zły (klasa V). 

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