Dominant Species and Diversity: Linking Relative Abundance to Controls of Species Establishment

2009 ◽  
Vol 174 (6) ◽  
pp. 850
Author(s):  
Gilbert ◽  
Turkington ◽  
Srivastava
Keyword(s):  
Relative Abundance ◽  
Dominant Species ◽  
Species Establishment

Dominant Species and Diversity: Linking Relative Abundance to Controls of Species Establishment

2009 ◽  
Vol 174 (6) ◽  
pp. 850-862 ◽  
Author(s):  
Benjamin Gilbert ◽  
Roy Turkington ◽  
Diane S. Srivastava
Keyword(s):  
Relative Abundance ◽  
Dominant Species ◽  
Species Establishment

Abundance of some native coccinellines (Coleoptera: Coccinellidae) before and after the appearance of Coccinella septempunctata

2003 ◽  
Vol 135 (3) ◽  
pp. 391-404 ◽  
Author(s):  
W.J. Turnock ◽  
I.L. Wise ◽  
F.O. Matheson
Keyword(s):  
Relative Abundance ◽  
Dominant Species ◽  
Coccinella Septempunctata ◽  
Abundant Species ◽  
Competitive Displacement ◽  
Field Crops ◽  
Transect Sampling ◽  
Visual Sampling ◽  
Before And After ◽  
The Mean

AbstractThe seven-spotted lady beetle, Coccinella septempunctata L., was first reported in Manitoba in 1988. The effect of this introduced species on the relative abundance of the more common native coccinellines was determined from D-Vac Insect Net® and sweepnet samples in alfalfa in 1983–2001, by sweepnet and visual sampling in field crops and other vegetation in 1989–2001, and by transect sampling of aggregations of coccinellines in spring and autumn on the shore of Lake Manitoba from 1989 to 2001. The trends of annual changes in the abundance of six species in southern Manitoba were similar, whether based on the mean density per 200 sweeps in alfalfa or on their relative abundance in alfalfa, on other vegetation, and in aggregations on the beach. Before 1988, Hippodamia tredecempunctata tibialis (Say), Coccinella transversoguttata richardsonii Brown, and Hippodamia convergens Guerin were the most abundant species, followed by Hippodamia parenthesis (Say) and Coccinella trifasciata perplexa Mulsant. By 1992, C. septempunctata had become the dominant species, but H. tredecempunctata has since been the dominant species in most collections. The relative abundance of C. transverso guttata, H. convergens, H. parenthesis, and C. trifasciata has decreased since the establishment of C. septempunctata. The decline in abundance of these species seems to be caused by their competitive displacement by C. septempunctata. Their displacement also might be a contributing factor in the slight increase in abundance of H. tredecempunctata because C. septempunctata may compete less directly with this species than with other native coccinellines.

Summer zooplankton distributions at the surface of the outer Bay of Fundy, eastern Canada

1989 ◽  
Vol 67 (11) ◽  
pp. 2725-2730 ◽  
Author(s):  
R. G. B. Brown ◽  
D. E. Gaskin
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Water Column ◽  
Relative Abundance ◽  
Dominant Species ◽  
Calanus Finmarchicus ◽  
Bay Of Fundy ◽  
Eastern Canada

Copepods and cladocerans were collected, mainly in August, from the top 0.25 m of the water column in the outer Bay of Fundy, off Brier Island, Nova Scotia (ca. 44°15′N, 66°23′W) in 1975–1978, Deer Island, New Brunswick (ca. 45°00′N, 67°00′W) in 1977–1978, and Grand Manan Island, New Brunswick (ca. 44°40′N, 66°43′W) in 1981. In 1975–1977, the dominant species at the surface off Brier Island were stage CIV-I Calanus finmarchicus and CVI-V Pseudocalanus sp. The copepods Acartia spp., Anomalocera pattersonii, Centropages sp., Eurytemora spp., and Oithonia similis and the cladocerans Evadne sp. and Podon sp. also occurred regularly. The relative abundance of Calanus finmarchicus declined during the period July–October 1976, though the proportion of stages CVI-V increased. The relative proportions of Pseudocalanus sp., and of its stages CVI-V, both declined during the same period. The community at the surface was similar to that collected in other studies from subsurface tows in the Bay of Fundy as a whole, including Brier, Deer, and Grand Manan islands. This was not true of Brier Island in 1978: CVI-V Calanus finmarchicus predominated, and other species were scarce. Our samples from Deer and Grand Manan islands resembled those from Brier Island in 1978, though CVI-V Calanus finmarchicus predominated even more strongly. We discuss the differences between our samples from Brier Island in 1978 and 1975–1977, and between the latter and our New Brunswick data. However, there is no obvious explanation for most of these anomalies.

scholarly journals Diversity and population dynamics of Odonata (Insecta: Odonata) in rice growing area of central Gujarat

2017 ◽  
Vol 30 (3) ◽  
pp. 149
Author(s):  
V. B. Rohmare ◽  
Darshana M. Rathod ◽  
B. M. Parasharya
Keyword(s):  
Population Dynamics ◽  
Community Structure ◽  
Relative Abundance ◽  
Paddy Field ◽  
Dominant Species ◽  
Diversity Index ◽  
Fish Farm ◽  
Paddy Fields ◽  
Point Count ◽  
Point Count Method

Odonates diversity was studied in Paddy field of central Gujarat during 2012 to 2015. Total 39 species belonging to 25 genera, under six families and two suborders were recorded. Total 17 species of Zygoptera (damselflies) and 22 species of Anisoptera (dragonflies) were recorded. Community structure and population dynamics of adult odonates were studied at Lingda village during July to December, 2012 through monitoring their population by point count method on three microhabitats (paddy field, village pond and fish farm). Total seventeen species were encounterd in the point count. Diversity index (H’) was highest (2.13) for paddy fields followed by fish farm (2.07) and village pond (1.99). Evenness value of the odonates also ranged between 0.7 and 0.8. Total four species (<em>Viz.</em> Ditch Jewel (25.0%), Green Marsh Hawk (17%), Ruddy Marsh Skimmer and Coromandal Marsh Dart (16% each) were dominant species in all three microhabitats. Both the suborders Anisoptera (dragonfly) and Zygoptera (damselfly) showed similar trend of population fluctuation during the study. Relative abundance was higher and remained constant during 4<sup>th</sup> week of September to 2<sup>nd</sup> week of October.

scholarly journals Distribusi Ikan pada Wilayah Genangan Berbeda di Danau Tempe, Sulawesi Selatan

2020 ◽  
Vol 5 (3) ◽  
pp. 183
Author(s):  
Rahmi Dina ◽  
Eko Harsono ◽  
Gema Wahyudewantoro ◽  
Lukman Lukman ◽  
Riky Kurniawan ◽  
...  
Keyword(s):  
Water Level ◽  
Relative Abundance ◽  
Dominant Species ◽  
Condition Factor ◽  
High Water ◽  
Fish Distribution ◽  
Maturity Stage ◽  
Anabas Testudineus ◽  
Gonad Maturity ◽  
Inundation Area

<strong>Fish Distribution at Different Inundation Areas in Lake Tempe, South Sulawesi. </strong>Lake Tempe area consists of permanent standing watersand non-permanent area (flooded area). This study aims to investigate the species and its relative abundance distribution, as well as the distribution of size, condition factor, and gonad maturity stage of dominant species at those different areas. Sampling was carried at high water level period (March, June, and August 2017) in 18 stations, stations 1 to 13 represent the non-permanent inundation areas, and stations 14 to 18 represent the permanent inundation area. Fish was caught using various gears. Fish was identified morphologically and the number was counted. The size of the dominant species was measured and the gonad maturity stage was determined. Data were analyzed using descriptive and inferential statistics. The results of this study show that the highest number of species is found in non-permanent inundation areas. Species that are only found in non-permanent inundation areas are <em>Clarias batrachus</em>, <em>Anabas testudineus</em>, <em>Pangasianodon hypopthalmus</em>, and <em>Trichopodus pectoralis</em>. The dominant fish in the non-permanent inundation area are <em>Oxyeleotris marmorata</em>, <em>Channa striata</em>, <em>Oreochromis niloticus</em>, <em>Trichopodus trichopterus</em>, and <em>Pterygoplichthys pardalis</em>. These fishes have contributed significantly to capture fisheries production. The most abundant fish is <em>Barbonymus gonionotus</em>. The condition factor and the gonad maturity stage of the <em>B. gonionotus</em>in in the both areas were not significantly different. Larger fishes and higher relative abundance of <em>B. gonionotus</em>, when the water level was rising, were found in permanent inundation area. It can be concluded that the existence of those different inundation areas is important for fisheries productivity in Lake Tempe

scholarly journals Mine-damaged leaves by Phyllocnistis citrella Stainton provide refuge for phytoseiids on grapefruit in Florida and Texas*

Zoosymposia ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. 118-123
Author(s):  
RAUL T. VILLANUEVA ◽  
CARL C. CHILDERS
Keyword(s):  
Relative Abundance ◽  
Dominant Species ◽  
Spider Mite ◽  
Patchy Distribution ◽  
Phytoseiid Mites ◽  
Phyllocnistis Citrella ◽  
Mature Leaves ◽  
Citrus Leafminer

Damages caused by pests to leaves can indirectly affect populations of other associated arthropods. The relative abundance of mites was compared across young healthy leaves, mature healthy leaves and mature leaves damaged by the citrus leafminer, Phyllocnistis citrella Stainton, on grapefruit in Florida and Texas. The spider mite Eotetranychus sexmaculatus (Riley) (Tetranychidae) was significantly more abundant on mined leaves in Florida, whereas in Texas tetranychids were found sporadically. Predaceous phytoseiid mites (Phytoseiidae) were significantly more abundant on mature mined leaves than on mature leaves without mines. Iphiseiodes quadripilis (Banks) (n= 139), Typhlodromalus peregrinus (Muma) (n= 122) and Euseius mesembrinus (Dean) (n= 18) were the most abundant phytoseiids in Florida; E. mesembrinus was the dominant species in Texas [>90% of identified specimens (n=13)]. Although relatively high numbers of predaceous stigmaeid mites (Stigmaeidae) were found in some occasions in Florida, they had a patchy distribution, resulting in no significant differences between mined and unmined leaf types in most sampling dates. They were not found in Texas.

scholarly journals Study on distribution and relative abundance of click beetle pests (Elateridae: Agriotes sp.) in Hungarian maize fields

2011 ◽  
pp. 107-113
Author(s):  
Antal Nagy ◽  
István Szarukán ◽  
Erzsébet lovász ◽  
István Dávid
Keyword(s):  
Relative Abundance ◽  
Dominant Species ◽  
Abundant Species ◽  
Pheromone Traps ◽  
Total Abundance ◽  
Additional Species ◽  
Click Beetle ◽  
Significant Damage

Click beetle pests (Elateridae: Agriotes sp.) of 24 sites in different regions of Hungary were studied in 2011. A. brevis, A. sputator, A.obscurus, A. lineatus, A. rufipalpis and A. ustulatus were sampled by pheromone traps in maize fields. During the study 65895 beetles werecaught. A. ustulatus and A. sputator were the most abundant species. Beyond that 23 additional species were trapped so the total number of sampled species was 29. The distribution of the six studied species was uneven. In east Hungary A. ustulatus were the most abundant, whilein the Transdanubia A. sputator was dominant in the most studied sites. A. obscurus occurred mostly in Transdanubia (western Hungary), and it occurred only in one site of eastern Hungary. The abundance of one or simultaneously two species reached the threshold of significant damage in 14 sites. Additionally there were three sites where the total abundance of the two most dominant species reached the threshold. There were only six sites where we should not expect significant damage. In this reason we have to monitor the populations of these pests and if it is necessary we have to take actions against them.

The relative abundance of Mortierella Coemans spp. in acid heath soils

1957 ◽  
Vol 5 (1) ◽  
pp. 36 ◽  
Author(s):  
EI McLennan ◽  
SC Ducker
Keyword(s):  
Relative Abundance ◽  
Species Distribution ◽  
Dominant Species ◽  
Local Effect ◽  
Soil Types ◽  
Fungal Population ◽  
Marked Contrast ◽  
Parallel Result ◽  
Analysis Of Results

The fungal population of two podzolized heath soils, one with and one without a hardpan, is characterized by a marked contrast in the species distribution of the genus Mortierella Linnemann.The dominant species in the hardpan soil is Mortierella ramanrniana (Möll) Linnemann, but when the pan is lacking it is replaced by Mortierella nana Linnemann. This is not a local effect, for an analysis of results from comparable English soils gives a parallel result. It can be stated that the dominance of one or other of these species is indicative of certain soil types.

scholarly journals Profiling of the viable bacterial and fungal microbiota in fermented feeds using single-molecule real-time sequencing

2020 ◽  
Vol 98 (2) ◽  
Author(s):  
Jie Yu ◽  
Qiangchuan Hou ◽  
Weicheng Li ◽  
Weiqiang Huang ◽  
Lanxin Mo ◽  
...  
Keyword(s):  
Real Time ◽  
Single Molecule ◽  
Relative Abundance ◽  
Dominant Species ◽  
Anaerobic Fermentation ◽  
Bacterial Species ◽  
Smrt Sequencing ◽  
Sequencing Technology ◽  
Fresh Matter ◽  
Before And After

Abstract Fermented concentrated feed has been widely recognized as an ideal feed in the animal industry. In this study, we used a powerful method, coupling propidium monoazide (PMA) pretreatment with single-molecule real-time (SMRT) sequencing technology to compare the bacterial and fungal composition of feeds before and after fermentation with four added lactic acid bacteria (LAB) inoculants (one Lactobacillus casei strain and three L. plantarum strains). Five feed samples consisting of corn, soybean meal, and wheat bran were fermented with LAB additives for 3 d. Following anaerobic fermentation, the pH rapidly decreased, and the mean numbers of LAB increased from 106 to 109 colony-forming units (cfu)/g fresh matter. SMRT sequencing results showed that the abundance and diversity of bacteria and fungi in the feed were significantly higher before fermentation than after fermentation. Fifteen bacterial species and eight fungal genera were significantly altered following fermentation, and L. plantarum was the dominant species (relative abundance 88.94%) in the post-fermentation group. PMA treatment revealed that the bacteria Bacillus cereus, B. circulans, Alkaliphilus oremlandii, Cronobacter sakazakii, Paenibacillus barcinonensis, and P. amylolyticus (relative abundance &gt;1%) were viable in the raw feed. After fermentation, their relative abundances decreased sharply to &lt;0.2%; however, viable L. plantarum was still the dominant species post fermentation. We inferred that our LAB additives grew rapidly and inhibited harmful microorganisms and further improved feed quality. In addition, coupling PMA treatment with the Pacific Biosciences SMRT sequencing technology was a powerful tool for providing accurate live microbiota profiling data in this study.

scholarly journals MACRO-ZOOPLANKTON ABUNDANCE IN RELATION TO METAL ACCUMULATION AND WATER QUALITY IN TRUC BACH LAKE

2020 ◽  
Vol 58 (3A) ◽  
pp. 105
Author(s):  
Hong Thi Pham ◽  
Khuong Van Dinh ◽  
Duc Tien Do ◽  
Ha Thi Thu Le ◽  
Thu Thi Ninh ◽  
...  
Keyword(s):  
Relative Abundance ◽  
Dominant Species ◽  
Metal Accumulation ◽  
Arsenic Concentration ◽  
Urban Ecosystems ◽  
Zooplankton Abundance ◽  
Essential Metals ◽  
Urban Lake ◽  
Zooplankton Species ◽  
Safety Level

Urban lake pollution is one of the serious issues due to suffering of waste discharged from householders. However, there is a gap of knowledge about the diversity of zooplankton species and how metals accumulate in zooplankton in urban ecosystems. We addressed this by determining the rule of blooming macro-zooplankton in Truc Bach lake and levels of two essential metals: copper (Cu), and zinc (Zn) and of three non-essential metals: arsenic (As), and lead (Pb) in water samples were determined. The results showed that Cladocerans and copepods are macro-zooplankton dominant species in Truc Bach Lake. Water temperature significantly affects the variety of copepod blooming. Arsenic concentration in water collected from the lake exceeded the safety level of current Vietnamese regulation. As concentration in macro-zooplankton positively correlated with metal concentrations in the water (p < 0.05) while the concentration of Cu, Zn, and Pb in water has no significant correlation with the metal in zooplankton’s body. The relative abundance of adult copepods in Truc Bach lake had a negative correlation with As concentration in water (p = 0.01). The higher As concentration in water, the lower relative abundance of copepods was found in the sample.

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