Long-term ecological monitoring and institutional memories

2017 ◽  
Vol 18 (3) ◽  
pp. 200-204
Author(s):  
David Lamb
Keyword(s):  
Ecological Monitoring

Long-Term Environmental and Socio-ecological Monitoring in Transboundary Landscapes; An Interdisciplinary Implementation Framework - ICIMOD Working Paper 2015/2

2015 ◽  
Author(s):  
N. Chettri ◽  
P. Bubb ◽  
R. Kotru ◽  
G. Rawat ◽  
R. Ghate ◽  
...  
Keyword(s):  
Ecological Monitoring ◽  
Implementation Framework ◽  
Working Paper

scholarly journals Simulated Fishing to Untangle Catchability and Availability in Fish Abundance Monitoring

2021 ◽  
Vol 19 (3) ◽  
Author(s):  
Vanessa Tobias ◽  
Keyword(s):  
San Francisco ◽  
Water Clarity ◽  
Ecological Monitoring ◽  
Monitoring Data ◽  
Delta Smelt ◽  
Individual Based Simulation ◽  
The Relationship ◽  
True Population

In fisheries monitoring, catch is assumed to be a product of fishing intensity, catchability, and availability, where availability is defined as the number or biomass of fish present and catchability refers to the relationship between catch rate and the true population. Ecological monitoring programs use catch per unit of effort (CPUE) to standardize catch and monitor changes in fish populations; however, CPUE is proportional to the portion of the population that is vulnerable to the type of gear used in sampling, which is not necessarily the entire population. Programs often deal with this problem by assuming that catchability is constant, but if catchability is not constant, it is not possible to separate the effects of catchability and population size using monitoring data alone. This study uses individual-based simulation to separate the effects of changing environmental conditions on catchability and availability in environmental monitoring data. The simulation combines a module for sampling conditions with a module for individual fish behavior to estimate the proportion of available fish that would escape from the sample. The method is applied to the case study of the well monitored fish species Delta Smelt (Hypomesus transpacificus) in the San Francisco Estuary, where it has been hypothesized that changing water clarity may affect catchability for long-term monitoring studies. Results of this study indicate that given constraints on Delta Smelt swimming ability, it is unlikely that the apparent declines in Delta Smelt abundance are the result of changing water clarity affecting catchability.

scholarly journals Alois Zlatnik – ein wegweisender Forscher in transkarpatischen Urwäldern | Alois Zlatnik – Innovative researcher in the virgin forests of Transcarpathia

2003 ◽  
Vol 154 (6) ◽  
pp. 219-225
Author(s):  
Stepan Stoyko ◽  
Ivan Delehan ◽  
Nino Kuhn ◽  
Vasyl Lavnyy
Keyword(s):  
Nature Conservation ◽  
Academic Career ◽  
Ecological Monitoring ◽  
Plant Taxonomy ◽  
Mountain Regions ◽  
Ecosystem Research ◽  
The Czech Republic ◽  
Ecological Principles ◽  
Forest Typology

Professor Alois Zlatnik (born 1902 in Dvur Kralovy, Czechoslovakia,died 1979 in Brno) was a well-known scientific researcher in the Czech Republic, Slovakia and other European countries. His academic career encompassed forest typology,phytobiocoenology, vegetation ecology and plant taxonomy. His fundamental exploration of the biocoenological structure of the virgin forests of Transcarpathia (Ukraine) commenced in the 1930s. At the same time he can be seen as the founder of long-term forest ecosystem research (ecological monitoring). Zlatnik was also an innovator regarding ecological principles of nature conservation of mountain regions.

scholarly journals Simulated Fishing to Untangle Catchability and Availability in Fish Abundance Monitoring

2021 ◽  
Author(s):  
Vanessa Tobias
Keyword(s):  
San Francisco ◽  
Water Clarity ◽  
Ecological Monitoring ◽  
Monitoring Data ◽  
Delta Smelt ◽  
Individual Based Simulation ◽  
The Relationship ◽  
True Population

In fisheries monitoring, catch is assumed to be a product of fishing intensity, catchability, and availability, where availability is defined as the number or biomass of fish present and catchability refers to the relationship between catch rate and the true population. Ecological monitoring programs use catch per unit of effort (CPUE) to standardize catch and monitor changes in fish populations; however, CPUE is proportional to the portion of the population that is vulnerable to the type of gear that is used in sampling, which is not necessarily the entire population. Programs often deal with this problem by assuming that catchability is constant, but if catchability is not constant, it is not possible to separate the effects of catchability and population size using monitoring data alone. This study uses individual-based simulation to separate the effects of changing environmental conditions on catchability and availability in environmental monitoring data. The simulation combines a module for sampling conditions with a module for individual fish behavior to estimate the proportion of available fish that would escape from the sample. The method is applied to the case study of the well-monitored fish species Delta Smelt (Hypomesus transpacificus) in the San Francisco Estuary, where it has been hypothesized that changing water clarity may affect catchability for long-term monitoring studies. Results of this study indicate that given constraints on Delta Smelt swimming ability, it is unlikely that the apparent declines in Delta Smelt abundance are due to an effect of changing water clarity on catchability.

Effective Long-term Ecological Monitoring Using Spatially and Temporally Nested Sampling

2007 ◽  
Vol 133 (1-3) ◽  
pp. 295-307 ◽  
Author(s):  
J. E. Hewitt ◽  
S. F. Thrush
Keyword(s):  
Ecological Monitoring ◽  
Nested Sampling

scholarly journals The order Tethyida (Porifera) in California: taxonomy, systematics, and the first member of the family Hemiasterellidae in the Eastern Pacific

2020 ◽  
Author(s):  
Thomas L. Turner
Keyword(s):  
Kelp Forest ◽  
Single Species ◽  
Ecological Monitoring ◽  
Eastern Pacific ◽  
The Third ◽  
Morphological Taxonomy ◽  
The Family ◽  
Ecological Importance

AbstractSponges (phylum Porifera) are ubiquitous inhabitants of marine ecosystems and have been shown to provide substantial ecosystem services. Despite this ecological importance, the sponge fauna in California has received little study. Here I use a collection of kelp forest sponges to describe the diversity of the order Tethyida in California. This order contains the genus Tethya, which has been included in long-term ecological monitoring projects. I show that Tethya vacua is a junior synonym of Tethya californiana, and thus all Tethya populations known in California belong to a single species. Genetic data from California’s only Timeidae, Timea authia, indicate that this species is in fact in the Tethyidae and is the third known member of the genus Tethytimea. I also describe the first member of the family Hemiasterellidae from the Eastern Pacific, Galaxia gaviotensis gen. nov. sp. nov. By combining field photographs, morphological taxonomy, and phylogenetic analysis of these samples, this work will facilitate future efforts to understand the evolution of this order and the ecological role of sponges in the California kelp forest.

scholarly journals Monitoring of Black Sea algal viruses Tetraselmis viridis and Phaeodactylum tricornutum in bays of Sevastopol as a component of ecological monitoring of the studied aquatories

2020 ◽  
pp. 139-148
Author(s):  
O.A. Stepanova ◽  
Keyword(s):  
Environmental Conditions ◽  
Phaeodactylum Tricornutum ◽  
Ecological Monitoring ◽  
Ecological Indicator ◽  
Maximum Frequency ◽  
Maximum Difference ◽  
Ecological Conditions ◽  
Algal Viruses ◽  
Tetraselmis Viridis

Virus monitoring is a widespread control of their background circulation. Since 2002, the monitoring of algal viruses that infect microalgae Tetraselmis viridis and Phaeodactylum tricornutum has been carried out in the bays of Sevastopol differing in ecological conditions. The purpose of this work is to analyze and assess the results of this long-term (2002–2020) monitoring. The results obtained with taking into account the exactingness or resistance to environmental conditions of hosts of algal viruses that infect microalgae T. viridis and P. tricornutum were the basis for the following conclusions regarding the ecological well-being of the studied bays of Sevastopol: – relatively favorable ecological conditions in 2007–2008, 2017–2018 and in 2020. (maximum frequency of isolation PtV, and/or minimum TvV, and / or maximum difference in frequency of isolation between PtV and TvV); – unfavorable ecological conditions in 2002–2003, 2006 and 2015 (maximum frequency of isolation TvV, and/or minimum PtV, and/or maximum difference in frequency of isolation between TvV and PtV). Analysis of the monitoring results of algal viruses of T. viridis and P. tricornutum in 2015–2020 revealed that the studied relatively ecologically safe bays are characterized by the maximum number of all isolates of algal viruses (both TvV and PtV) and the numerical predominance of strains of algal virus of P. tricornutum, which is demanding to environmental conditions. At the same time, the minimum amount of all viral isolates was recorded in the ecologically unfavorable bay. The results of a long-term monitoring of algal viruses of T. viridis and P. tricornutum have established the possibility of using the monitoring of marine viruses, in particular of algal viruses of microalgae which are indicative of the ecological situation, as a component of complex ecological monitoring as ecological indicator.

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