scholarly journals The habitat preferences of fishes from the Limpopo river system, Transvaal and Mocambique

Koedoe ◽  
1973 ◽  
Vol 16 (1) ◽  
Author(s):  
I.G. Gaigher
Keyword(s):  
Species Composition ◽  
Habitat Preferences ◽  
River System ◽  
Frequency Of Occurrence ◽  
Check List

The species composition of fishes in the Limpopo River system is described. The frequency of occurrence for eachhabitat type is expressed as a percentage of the habitats sampled. A check list of species is presented and the species can be grouped into five habitat preferences.

scholarly journals Desmid algae (Charophyta: Conjugatophyceae) of Ekaterinburg, Middle Urals, Russia

2018 ◽  
Vol 55 ◽  
pp. 7-15
Author(s):  
Andrei S. Shakhmatov ◽  
Evgeniy V. Pavlovskiy ◽  
Alexander G. Paukov
Keyword(s):  
Species Composition ◽  
Correspondence Analysis ◽  
Canonical Correspondence Analysis ◽  
Habitat Preferences ◽  
Water Bodies ◽  
Middle Urals ◽  
The Middle Urals

Species composition of desmid algae and their habitat preferences in water bodies of Ekaterinburg city were studied during the 2013–2017. Thirty-seven species and subspecific taxa which belong to 12 genera and 2 families were identified, of which 17 species are new for the eastern macroslope of the Middle Urals. Canonical correspondence analysis, which was performed to reveal habitat preferences, demonstrates that the majority of analyzed species prefer quarry lakes, ponds and overgrown lake shores, contrary to fens and rivers.

scholarly journals ФІТОПАРАЗИТИЧНІ НЕМАТОДИ ПРИРОДНИХ ЕКОСИСТЕМ ЛІВОБЕРЕЖНОГО ПОЛІССЯ (У МЕЖАХ ЧЕРНІГІВСЬКОЇ ОБЛАСТІ)

2020 ◽  
Vol 79 (1-2) ◽  
pp. 42-47
Author(s):  
V. L. Shevchenko ◽  
T. M. Zhylina
Keyword(s):  
Species Composition ◽  
Left Bank ◽  
Frequency Of Occurrence ◽  
Soil Nematodes ◽  
Natural Ecosystems ◽  
Dominant Group ◽  
Nature Park ◽  
Nematode Abundance ◽  
Longidorus Elongatus ◽  
Eleven Species

The species composition, frequency of occurrence, and the abundance of phytohelminths in communities of soil nematodes in natural ecosystems of the Left-Bank Polissia (Chernihiv region) were studied. Samples were collected throughout 2011-2016 in forest and meadow ecosystems on the territory of Chernihivskyi, Horodnianskyi, Kozeletskyi, Koropskyi, Menskyi, Ripkynskyi, Sosnytskyi, Semenivskyi, Shchorskyi and Novhorod-Siverskyi districts. Nematodes were extracted by a modified Baermann’s method from the 20-g sample. The exposition time was 48 h. Extracted nematodes were fixed in the triethanolamine–formalin (TAF, 2 % triethanolamine, 7 % formaldehyde solution, 91% water), and mounted on the temporary hydroglyceric slides. Nematode abundance was expressed as specimens per 100 g of dry soil. Seventeen species from three orders, ten families and fifteen genera were found. Eleven species (64.7 % of the species composition) belonged to the order of Tylenchida, four (23.5 %) – Triplonchida, two (11.8 %) – Dorylaimida. Eleven species (Gracilacus audriellus, Paratylenchus nanus, Tylenchorhynchus dubius, Helicotylenchus dihystera, Macroposthonia annulata, Diphtherophora communis, Trichodorus primitivus, Paratrichodorus teres, Paratrichodorus pachydermus, Longidorus elongatus, Xiphinema index) are ectoparasites, three species (Ditylenchus dipsaci, Pratylenchus pratensis, Hirschmaniella gracilis) – endoparasites, and three species (Hemicycliophora sp., Heterodera sp. 1, Heterodera sp. 2) – semiendoparasites. Phytohelminths in communities of soil nematodes in forest ecosystems ranged from 9.4 to 26.3 %. But in meadow ecosystems of the Mezin National Nature Park it was a dominant group (proportion in the community 47%). The most frequent species were G. audriellus, H. dihystera and T. dubius which occurred in 33.3 %, 33.3 % and 28.3 % of samples respectively. P. nanus, D. dipsaci, P. pratensis та D. communis – had frequency of occurrence 15 – 20%. Ten species of phytohelminths were found in 1–4 ecosystems (1.7–6.7%). G. audriellus and H. dihystera were abundant (124 and 56 specimens per 100 g of soil respectively).

scholarly journals KOMUNITAS MAKRO ALGA DI PERAIRAN PANTAI ERI TELUK AMBON

2019 ◽  
Vol 15 (1) ◽  
pp. 40-45
Author(s):  
Frijona F Lokollo
Keyword(s):  
Community Structure ◽  
Species Composition ◽  
Relative Frequency ◽  
Occurrence Frequency ◽  
Frequency Of Occurrence ◽  
Gracilaria Salicornia ◽  
Turbinaria Ornata ◽  
Belt Transect ◽  
Macro Algae

This research was conducted in Eri Beach, Ambon Bay on November 2016 to study community structure which consist of species composition, density and occurrence frequency of macro algae.  Sample of macro algae was collected by using belt transect method.  The results showed that there were 11 species of macro algae in the area which were belonged to 11 genera, 9 families, 8 orders, 3 classes and 3 divisions. Those species were Halimeda opuntia and Caulerpa serrulata (Chlorophyta), Padina minor and Turbinaria ornata (Phaeophya), Amphiroa rigida, Galaxaura rugosa, Ceratodictyon spongiosum, Gracilaria Salicornia, Laurencia papillosa, Acanthophora muscoides and Halymenia durvillaei (Rhodophyta). The highest density was represented by Amphiroa rigida (2.02 ind/m2) while the highest relative frequency of occurrence belonged to Padina minor (27%). Keywords : Community, macro algae, density, Eri, Ambon Bay   ABSTRAK Penelitian ini bertujuan untuk mengetahui struktur komunitas makro alga meliputi komposisi jenis, frekuensi kehadiran serta kepadatan di Pantai Eri. Penelitian dilakukan pada bulan November 2016. Stasiun pengamatan makro alga yaitu di perairan pantai Eri. Metode sampling menggunakan Belt Transect. Hasil penelitian ditemukan 11 spesies, 11 genus, 9 famili, 8 ordo, 3 kelas dan 3 devisi. Chlorophyta terdiri dari Halimeda opuntia dan Caulerpa serrulata. Phaeophya terdiri dari Padina minor dan Turbinaria ornata. Rhodophyta terdiri dari Amphiroa rigida, Galaxaura rugosa, Ceratodictyon spongiosum, Gracilaria Salicornia, Laurencia papillosa, Acanthophora muscoides dan Halymenia durvillaei. Kepadatan jenis tertinggi spesies A. rigida (2.02 ind/m2) dan frekuensi kehadiran relatif tertinggi spesies Padina minor (27%).

New species of Crotonia (Acari: Oribatida) from Tasmania Rainforest, and the habitat preferences of Crotoniidae

Zootaxa ◽  
2009 ◽  
Vol 2027 (1) ◽  
pp. 43-54
Author(s):  
MATTHEW J. COLLOFF
Keyword(s):  
New Species ◽  
Habitat Preferences ◽  
Oribatid Mite ◽  
Mean Annual Temperature ◽  
Frequency Of Occurrence ◽  
Two New Species ◽  
Terrestrial Habitats ◽  
Closed Canopy ◽  
Arboreal Habitat ◽  
Subjective Synonym

Two new species of oribatid mite belonging to the genus Crotonia are described from tree trunks and their associated bryophytes in callidendrous rainforest, dominated by Nothofagus cunninghami, in Northeastern Tasmanian: C. tasmaniana sp. nov. and C. pyemaireneri sp. nov. Holonothrus ryszardi Łochyńska, 2008 is designated the junior subjective synonym of Crotonia ovata Olszanowski, 2000, and a supplementary description of the latter species is provided. The apparent arboreal habitat preferences of crotoniid mites are considered. In Tasmanian rainforest, the frequency of occurrence of these mites in moss on bark is higher than in terrestrial habitats, but not significantly so. High rainfall, a closed canopy, a low mean annual temperature and a consequent extensive corticolous and terricolous cover of bryophytes presents a continuum for these mites between ground and above-ground habitats.

scholarly journals An annotated check list of the birds of Qwaqwa National Park

Koedoe ◽  
1996 ◽  
Vol 39 (1) ◽  
Author(s):  
D.H. De Swardt ◽  
D.J. Van Niekerk
Keyword(s):  
National Park ◽  
Habitat Preferences ◽  
Bird Species ◽  
Golden Gate ◽  
Check List

This paper presents a check list of 179 bird species occuring in the Qwaqwa National Park which borders the eastern part of Golden Gate Highlands National Park. Data on the distribution, status, habitat preferences and breeding were obtained during several visits between December 1992 and March 1995. The following habitats were preferred: grassland, montane grassland, woodland, rocky hillsides, mountain slopes and riverine areas with Phragmites reedbeds. The conservation of waterbirds, raptors and other localised species such as Orangebreasted Rockjumper, Palecrowned Cisticola, Mountain Pipit and Gurney's Sugarbird is important as these species occur in specialised habitats.

scholarly journals Habitat selection determines abundance, richness and species composition of beetles in aquatic communities

2005 ◽  
Vol 1 (3) ◽  
pp. 370-374 ◽  
Author(s):  
Christopher A Binckley ◽  
William J Resetarits
Keyword(s):  
Species Richness ◽  
Habitat Selection ◽  
Species Composition ◽  
Large Scale ◽  
Habitat Preferences ◽  
Differential Mortality ◽  
Aquatic Communities ◽  
Species Sorting ◽  
Random Dispersal ◽  
Random Site

Distribution and abundance patterns at the community and metacommunity scale can result from two distinct mechanisms. Random dispersal followed by non-random, site-specific mortality (species sorting) is the dominant paradigm in community ecology, while habitat selection provides an alternative, largely unexplored, mechanism with different demographic consequences. Rather than differential mortality, habitat selection involves redistribution of individuals among habitat patches based on perceived rather than realized fitness, with perceptions driven by past selection. In particular, habitat preferences based on species composition can create distinct patterns of positive and negative covariance among species, generating more complex linkages among communities than with random dispersal models. In our experiments, the mere presence of predatory fishes, in the absence of any mortality, reduced abundance and species richness of aquatic beetles by up to 80% in comparison with the results from fishless controls. Beetle species' shared habitat preferences generated distinct patterns of species richness, species composition and total abundance, matching large-scale field patterns previously ascribed to random dispersal and differential mortality. Our results indicate that landscape-level patterns of distribution and species diversity can be driven to a large extent by habitat selection behaviour, a critical, but largely overlooked, mechanism of community and metacommunity assembly.

scholarly journals Entomofauna of winter wheat in the Right-bank Forest-Steppe of Ukraine

2020 ◽  
Vol 107 (3) ◽  
pp. 96-104
Author(s):  
V. Medvid ◽  
Keyword(s):  
Species Composition ◽  
Winter Wheat ◽  
Sitobion Avenae ◽  
Forest Steppe ◽  
Frequency Of Occurrence ◽  
Eurygaster Integriceps ◽  
The Right ◽  
Occurrence Of Species

Entomofauna of winter wheat in the Right-bank Forest-Steppe of Ukraine The entomofauna of winter wheat in the Right-Bank Forest-Steppe of Ukraine during the spring-summer vegetation of 2017–2019, which consisted of 46 species from 8 orders of insects, was studied. 32 species from 17 families were identified among the phytophages winter wheat. The greatest diversity of the Coleoptera was shown. The species composition of the entomocomplex of each year is analyzed, the frequency of occurrence of species is determined. It was found that during three years of research in the agrocenosis of wheat most often there were only three species: Haplothrips tritici Kurd., Sitobion avenae F. and Eurygaster integriceps Put. Keywords: entomofauna, species composition, winter wheat, phytophages, entomophages.

scholarly journals Měkkýší fauna rybníka Strašík u Libouně (střední Čechy, okres Benešov) a poznámky k fauně rybníků na Podblanicku [The Molluscan Fauna of Strašík Pond by Libouň Village (Central Bohemia, Benešov District) and Several Notes to Malacofauna of Ponds in Podblanicko Region]

2003 ◽  
Vol 2 ◽  
pp. 19-26
Author(s):  
Vladimír Vrabec
Keyword(s):  
Czech Republic ◽  
Species Composition ◽  
Lymnaea Stagnalis ◽  
Point Of View ◽  
Quantitative Composition ◽  
Frequency Of Occurrence ◽  
Bithynia Tentaculata ◽  
Radix Peregra ◽  
Molluscan Fauna ◽  
Basic Characteristics

In the pond Strašík by Libouň (Czech Republic, WGS 84: 49°37'50"N, 14°49'30"E) 14 species of water molluscs were documented by the research executed on 8 June 2001: Radix peregra, Lymnaea stagnalis, Anisus vortex, Bathyomphalus contortus, Gyraulus albus, Gyraulus crista, Hippeutis complanatus, Musculium lacustre, Pisidium casertanum, Pisidium milium, Pisidium nitidum, Pisidium obtusale, Pisidium personatum, Pisidium subtruncatum. The basic characteristics of the community were determined: quantitative composition and dominance. The index of the concentrated dominance modified according to Simpson (c = 0,33) was counted and compared with available data. The pond fauna was compared to the fauna of other examined ponds in Podblanicko. The total of 12 ponds were examined in this region or its closest surroundings so far and 21 species of water molluscs were found in them. The pond Strašík, analysed in this study, is richest in species variety, as it has 14 species, the least occupied are the ponds Splav by Bystřice (2 species) and the first pond above the pond Utopenec by Vlašim (3 species). In the case of these ponds the result is probably due to the fact that they are relatively little known. The species Anisus vortex, Lymnaea stagnalis and Gyraulus albus have the highest frequency of occurrence in the ponds examined so far in Podblanicko, the least frequent are the species Bithynia tentaculata, Acroloxus lacustris and Pisidium personatum. The similarity of the species composition of the ponds fauna was evaluated according to the Jaccard’s index. The pond most similar to the Strašík pond analyzed in this study is from the point of view of the species presence the pond Utopenec on the stream Orlina (8 and 12), which is situated nearby.

scholarly journals SPECIES COMPOSITION AND HABITAT OF BUTTERFLY IN MUA XUAN AGRICULTURAL CENTER, HAU GIANG PROVINCE

2019 ◽  
Vol 1 (25) ◽  
pp. 60-67
Author(s):  
Dan Hoang Truong ◽  
Lien Thi Bich Tran ◽  
Tho Truong Bui
Keyword(s):  
Species Composition ◽  
Butterfly Species ◽  
Frequency Of Occurrence

The survey was carried out in Mua Xuan agricultural center, Hau Giang province from 9/2014 to 12/2014. The study recorded 41 butterfly species, which belong to 32 genera of 05 families. Nymphalidae was the most dominant family, followed by Pieridae, Hesperiidae and Lycaenidae whereas Papilionidae had the lowest frequency of occurrence. The findings also indicated that Melaleuca forest and roadside sight were two diverse habitats where the butterfly species were found most.

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