scholarly journals Variability in periphyton community and biomass over 37 years in Lake Tahoe (CA-NV)

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Karen S. Atkins ◽  
Scott H. Hackley ◽  
Brant C. Allen ◽  
Shohei Watanabe ◽  
John E. Reuter ◽  
...  
Keyword(s):  
Lake Level ◽  
Monitoring Program ◽  
Lake Tahoe ◽  
Oligotrophic Lakes ◽  
Peak Biomass ◽  
Periphyton Biomass ◽  
Development Levels ◽  
The 1960S ◽  
Term Monitoring

AbstractNuisance periphyton blooms are occurring in oligotrophic lakes worldwide, but few lakes have documented changes in biomass through periphyton monitoring. For decades periphyton has caused concern about oligotrophic Lake Tahoe’s nearshore water quality. To determine whether eulittoral periphyton increased in Lake Tahoe, measures of biomass and dominant communities at 0.5 m below lake level have been monitored regularly at nine shoreline sites starting in 1982, with up to 54 additional sites monitored annually at peak biomass. Lake-wide, this metric of periphyton biomass has not increased since monitoring began. Biomass decreased at many sites and increased at one. Periphyton biomass peaked in March and was low in the summer lake-wide. The northern and western shores had higher biomass than the eastern and southern shores. Biomass varied with lake level. High biomass occurred at sites regardless of urban development levels. As increasing periphyton at Lake Tahoe was first cited in scientific literature in the 1960s, it is possible that periphyton increased prior to our monitoring program. A dearth of published long-term monitoring data from oligotrophic lakes with reported periphyton blooms makes it difficult to determine the extent of this issue worldwide. Long-term nearshore monitoring is crucial for tracking and understanding periphyton blooms.

Distribution and Abundance of Odonata Species Across Massachusetts: Results of a Long-term Monitoring Program

2016 ◽  
Vol 23 (4) ◽  
pp. 501-524 ◽  
Author(s):  
Robert Buchsbaum ◽  
Christopher W. Leahy ◽  
Taber Allison
Keyword(s):  
Monitoring Program ◽  
Long Term Monitoring ◽  
Term Monitoring

Census of the Brown Hare (Lepus europaeus) at Leveste, Municipality of Gehrden, Germany

2013 ◽  
pp. 168-171
Author(s):  
Gabor von Bethlenfalvy ◽  
Julia Hindersin ◽  
Egbert Strauß
Keyword(s):  
Arable Land ◽  
Monitoring Program ◽  
Lepus Europaeus ◽  
Brown Hare ◽  
Lower Saxony ◽  
Long Term Monitoring ◽  
Term Monitoring

The case study used spotlight strip census routes to estimate Brown Hare numbers in a 793 ha hunting district. The habitats, dominated by intensively farmed arable land were also mapped. This is part of a Germany-wide long-term monitoring program of game populations which is carried out by hunters and was initiated by the German Hunters’ Association and the Hunters’ Association of Lower Saxony in 2001.

scholarly journals Two practical approaches to monitoring the zooplanktonic community at Lago Grande do Curuai, Pará, Brazil

2015 ◽  
Vol 45 (3) ◽  
pp. 293-298 ◽  
Author(s):  
Leonardo Fernandes GOMES ◽  
Ludgero Cardoso Galli VIEIRA ◽  
Marie Paule BONNET
Keyword(s):  
Spatial Distribution ◽  
Monitoring Program ◽  
Zooplankton Community ◽  
Species Level ◽  
Genus Level ◽  
Time Costs ◽  
Financial Costs ◽  
Long Term Monitoring ◽  
Term Monitoring

The use of substitute groups in biomonitoring programs has been proposed to minimize the high financial costs and time for samples processing. The objectives of this study were to evaluate the correlation between (i) the spatial distribution among the major zooplankton groups (cladocerans, copepods, rotifers, and testaceans protozoa), (ii) the data of density and presence/absence of species, and (iii) the data of species, genera, and families from samples collected in the Lago Grande do Curuai, Pará, Brazil. A total of 55 sample of the zooplanktonic community was collected, with 28 samples obtained in March and 27 in September, 2013. The agreement between the different sets of data was assessed using Mantel and Procrustes tests. Our results indicated high correlations between genus level and species level and high correlations between presence/absence of species and abundance, regardless of the seasonal period. These results suggest that zooplankton community could be incorporated in a long-term monitoring program at relatively low financial and time costs.

scholarly journals The Louisiana Amphibian Monitoring Program from 1997 to 2017: Results, analyses, and lessons learned

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257869
Author(s):  
Jacoby Carter ◽  
Darren Johnson ◽  
Jeff Boundy ◽  
William Vermillion
Keyword(s):  
Urban Areas ◽  
Monitoring Program ◽  
Lessons Learned ◽  
The North ◽  
Osteopilus Septentrionalis ◽  
Species Lists ◽  
Demographic Patterns ◽  
North And South ◽  
Term Monitoring

To determine trends in either frog distribution or abundance in the State of Louisiana, we reviewed and analyzed frog call data from the Louisiana Amphibian Monitoring Program (LAMP). The data were collected between 1997 and 2017 using North American Amphibian Monitoring Program protocols. Louisiana was divided into three survey regions for administration and analysis: the Florida Parishes, and 2 areas west of the Florida parishes called North and South. Fifty-four routes were surveyed with over 12,792 stops and 1,066 hours of observation. Observers heard 26 species of the 31 species reported to be in Louisiana. Three of the species not heard were natives with ranges that did not overlap with survey routes. The other two species were introduced species, the Rio Grande Chirping Frog (Eleutherodactylus cystignathoides) and the Cuban Treefrog (Osteopilus septentrionalis). Both seem to be limited to urban areas with little to no route coverage. The 15 most commonly occurring species were examined in detail using the percentage of stops at which they observed along a given survey and their call indices. Most species exhibited a multimodal, concave, or convex pattern of abundance over a 15-year period. Among LAMP survey regions, none of the species had synchronous population trends. Only one group of species, winter callers, regularly co-occur. Based on the species lists, the North region could be seen as a subset of the South. However, based on relative abundance, the North was more similar to Florida parishes for both the winter and summer survey runs. Our analyses demonstrate that long-term monitoring (10 years or more) may be necessary to determine population and occupancy trends, and that frog species may have different local demographic patterns across large geographic areas.

scholarly journals Augmentation of a Long-term Monitoring Program for Lake George, NY by Citizen Volunteers

2004 ◽  
Vol 20 (2) ◽  
pp. 121-129 ◽  
Author(s):  
Charles W. Boylen ◽  
Eric A. Howe ◽  
Jeffrey S. Bartkowski ◽  
Lawrence W. Eichler
Keyword(s):  
Monitoring Program ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Lake George

scholarly journals P286Safety and effectiveness of dabigatran relative to warfarin in routine care: final results from a long-term monitoring program

2018 ◽  
Vol 39 (suppl_1) ◽  
Author(s):  
C Gopalakrishnan ◽  
K F Huybrechts ◽  
A S Ortiz ◽  
K Zint ◽  
V K Gurusamy ◽  
...  
Keyword(s):  
Monitoring Program ◽  
Routine Care ◽  
Long Term Monitoring ◽  
Term Monitoring
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