A Rock Pool Lichen Community in Northern Transvaal, South Africa: Composition and Distribution Patterns

1989 ◽  
Vol 21 (3) ◽  
pp. 259-277 ◽  
Author(s):  
D. C. J. Wessels ◽  
B. Büdel
Keyword(s):  
South Africa ◽  
Water Supply ◽  
Statistical Tests ◽  
Distribution Patterns ◽  
Lichen Species ◽  
Rock Pool ◽  
Lichen Community ◽  
Light Levels ◽  
The Family ◽  
Exposed Situation

AbstractThe distribution patterns of lichens belonging to the family Peltulaceae and procaryotic algae (cyanobacteria) were studied in a rock pool on a sandstone koppie (‘Inselberg’). situated in the mopane savanna of the northern Transvaal. The co-dominant lichen species along the wall of the pool were: Peltula clavata (Krempelh.) Wetmore, P. euploca (Ach.) Poelt ex Pisut, P. obscurans (Nyl.) Gyelnik, and P. placodizans (Zahlbr.) Wetmore. The cyanobacteria Gloeocapsa sanguinea (Ag.) Kütz. emend. Jaag, Plectonema tomasinianum Gom. ex Gom., Rivularia sp., Scytonema sp. and Tolypothrix sp. grew epilithically between the lichen thalli. Unicellular species of the genus Chroococcidiopsis Geitler or Myxosarcina Printz occurred cryptoendolithically. The distribution patterns of several lichen species are presented and statistical tests reveal distinct correlations of the habitats of some species with light levels and water supply; e.g. the olive-green P. placodizans preferred the fully exposed situation near and along the rim of the rock pool; the black species P. clavata was restricted to areas next to the water level.

HUBUNGAN DUKUNGAN KELUARGA TERHADAP TINGKAT KEMANDIRIAN ANAK RETARDASI MENTAL

2019 ◽  
Vol 11 (2) ◽  
pp. 87-92
Author(s):  
Dwi Indah Iswanti ◽  
Fery Agusman Motuho Mendrofa ◽  
Diyanto Diyanto
Keyword(s):  
Family Support ◽  
Quantitative Method ◽  
Statistical Tests ◽  
Sampling Technique ◽  
Mentally Retarded ◽  
P Value ◽  
Cross Sectional ◽  
Need Support ◽  
The Family ◽  
Mentally Retarded Children

Kemandirian bukanlah keterampilan yang muncul secara tiba-tiba tetapi perlu diajarkan dan dilatih pada anak agar tidak menghambat tugas- tugas perkembangan anak selanjutnya. Terutama pada anak yang mengalami retardasi mental akan sangat membutuhkan dukungan dari keluarga. Tujuan penelitian untuk mengetahui hubungan  dukungan keluarga dengan tingkat kemandirian anak retardasi mental di SLB Negeri Semarang. Penelitian ini menggunakan metode kuantitatif dengan pendekatan cross sectional. Populasi dalam penelitian ini adalah seluruh orang tua siswa kelas IV-VI di SLB Negeri Semarang yang berjumlah 64 siswa. Teknik sampling yang digunakan adalah total sampling. Dukungan keluarga pada anak retardasi mental sebagian besar adalah mendukung yaitu sebanyak 53,1%, kemandirian anak retardasi mental sebagian besar adalah kurang mandiri yaitu sebanyak 53,1%. Hasil uji statistik menemukan ada hubungan antara dukungan keluarga dengan kemandirian anak retardasi mental di SLB Negeri Semarang, dengan p value sebesar 0,000.   Kata kunci : dukungan keluarga, kemandirian anak retardasi mental THE CORRELATION BETWEEN FAMILY SUPPORT AND THE LEVEL OF INDEPENDENCE OF MENTALLY RETARDED CHILDREN   ABSTRACT Independence is not a skill that emerges suddenly but needs to be taught and trained in children so as not to inhibit the tasks of further child development. Especially for children who are mentally retarded, they will need support from the family. Research objectives to find out the correlation between family support and the level of independence of mentally retarded children in extraordinary school State of Semarang. This study uses a quantitative method with a cross sectional approach. The population in this study were all parents of students in class IV-VI in Semarang State SLB, amounting to 64 students. The sampling technique used is total sampling. Family support for mentally retarded children was mostly supportive, as much as 53.1%, the independence of most mentally retarded children was less independent, which was as much as 53.1%. The results of statistical tests found that there was a correlation between family support and the independence of mentally retarded children in Semarang State SLB, with a p value of 0,000.   Keywords: family support, independence of mentally retarded children

The Family in Modern South Africa: Insights from Recent Research

2016 ◽  
Vol 47 (3) ◽  
pp. 309-321 ◽  
Author(s):  
R Sooryamoorthy ◽  
Mzwandile Makhoba
Keyword(s):  
South Africa ◽  
The Family

Introduction

2017 ◽  
Author(s):  
M.G.L. Mills ◽  
M.E.J. Mills
Keyword(s):  
South Africa ◽  
Arid Region ◽  
Statistical Tests ◽  
Distribution Range ◽  
Individual Identification ◽  
Behavioural Ecology ◽  
Main Study ◽  
Doubly Labelled Water ◽  
Data Loggers ◽  
Prime Objective

Most cheetah studies have been confined to mesic savannahs, yet much of its distribution range covers arid systems. The prime objective in this study was to examine the species’ adaptations to an arid region, to compare the results with those from other cheetah studies, especially from the Serengeti, and to analyse the data within the framework of carnivore population and behavioural ecology. The study was conducted in the Kgalagadi Transfrontier Park South Africa/Botswana, an area receiving 180–250 mm rainfall per year. Tracking spoor with the help of Bushmen trackers and continuous follows of 21 VHF radio-collared cheetahs were the main study methods used. These were supported by photographic records for individual identification, DNA studies for genetic aspects including paternity, and the use of doubly labelled water and the fitting of miniature data loggers for energetic studies. The statistical tests used to analyse the data are described.

Climate change impacts on water resources in a rural community in Limpopo province, South Africa: a community-based adaptation to water insecurity

2020 ◽  
Vol 12 (5) ◽  
pp. 587-598
Author(s):  
Sejabaledi Agnes Rankoana
Keyword(s):  
Climate Change ◽  
South Africa ◽  
Water Resources ◽  
Water Supply ◽  
Rural Community ◽  
Limpopo Province ◽  
Community Based ◽  
Content Type ◽  
Adaptation Practices ◽  
Community Based Adaptation

Purpose The study explored the impacts of climate change on water resources, and the community-based adaptation practices adopted to ensure water security in a rural community in Limpopo Province, South Africa. Design/methodology/approach The study was conducted in Limpopo Province, South Africa. The participatory approach was used to allow community members to share their challenges of water scarcity, and the measures they have developed to cope with inconsistent water supply. Findings The study results show that the community obtains water for household consumption from the reticulation system supplied by Mutale River and the community borehole. These resources are negatively impacted by drought, change in the frequency and distribution of rainfall, and increased temperature patterns. The water levels in the river and borehole have declined, resulting in unsustainable water supply. The community-based adaptation practices facilitated by the water committee include observance of restrictions and regulations on the water resources use. Others involve securing water from neighbouring resources. Originality/value This type of community-based action in response to climate change could be used as part of rural water management strategies under climate change.

scholarly journals Spatial Distribution of Lichens in Metrosideros excelsa in Northern New Zealand Urban Forests

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 170
Author(s):  
Gladys N. Benitez ◽  
Glenn D. Aguilar ◽  
Dan Blanchon
Keyword(s):  
Spatial Distribution ◽  
Species Richness ◽  
New Zealand ◽  
Lichen Species ◽  
Positive Correlation ◽  
Breast Height ◽  
Lichen Community ◽  
The North ◽  
The City ◽  
Lichen Flora

The spatial distribution of corticolous lichens on the iconic New Zealand pōhutukawa (Metrosideros excelsa) tree was investigated from a survey of urban parks and forests across the city of Auckland in the North Island of New Zealand. Lichens were identified from ten randomly selected trees at 20 sampling sites, with 10 sites classified as coastal and another 10 as inland sites. Lichen data were correlated with distance from sea, distance from major roads, distance from native forests, mean tree DBH (diameter at breast height) and the seven-year average of measured NO2 over the area. A total of 33 lichen species were found with coastal sites harboring significantly higher average lichen species per tree as well as higher site species richness. We found mild hotspots in two sites for average lichen species per tree and another two separate sites for species richness, with all hotspots at the coast. A positive correlation between lichen species richness and DBH was found. Sites in coastal locations were more similar to each other in terms of lichen community composition than they were to adjacent inland sites and some species were only found at coastal sites. The average number of lichen species per tree was negatively correlated with distance from the coast, suggesting that the characteristic lichen flora found on pōhutukawa may be reliant on coastal microclimates. There were no correlations with distance from major roads, and a slight positive correlation between NO2 levels and average lichen species per tree.

scholarly journals Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1121
Author(s):  
Marwa Kerboua ◽  
Monia Ali Ahmed ◽  
Nsevolo Samba ◽  
Radhia Aitfella-Lahlou ◽  
Lucia Silva ◽  
...  
Keyword(s):  
Functional Foods ◽  
Sesquiterpene Lactones ◽  
Diphenyl Ether ◽  
Lichen Species ◽  
Phytochemical Screening ◽  
Mediterranean Species ◽  
Esi Ms ◽  
Phytochemical Investigation ◽  
The Family ◽  
Nmr Techniques

The present study provides new data concerning the chemical characterisation of Physcia mediterranea Nimis, a rare Mediterranean species belonging to the family Physciaceae. The phytochemical screening was carried out using GC-MS, HPLC-ESI-MS-MS, and NMR techniques. Hot extraction of n-hexane was carried out, followed by separation of the part insoluble in methanol: wax (WA-hex), from the part soluble in methanol (ME-hex). GC-MS analysis of the ME-hex part revealed the presence of methylbenzoic acids such as sparassol and atraric acid and a diterpene with a kaurene skeleton which has never been detected before in lichen species. Out of all the compounds identified by HPLC-ESI-MS-MS, sixteen compounds are common between WA-hex and ME-hex. Most are aliphatic fatty acids, phenolic compounds and depsides. The wax part is characterised by the presence of atranorin, a depside of high biological value. Proton 1H and carbon 13C NMR have confirmed its identification. Atranol, chloroatranol (depsides compound), Ffukinanolide (sesquiterpene lactones), leprolomin (diphenyl ether), muronic acid (triterpenes), and ursolic acid (triterpenes) have also been identified in ME-hex. The results suggested that Physcia mediterranea Nimis is a valuable source of bioactive compounds that could be useful for several applications as functional foods, cosmetics, and pharmaceuticals.

Phylogeny accurately predicts behaviour in Indian Ocean Clitaetra spiders (Araneae:Nephilidae)

2009 ◽  
Vol 23 (3) ◽  
pp. 193 ◽  
Author(s):  
Matjaž Kuntner ◽  
Ingi Agnarsson
Keyword(s):  
South Africa ◽  
Phylogenetic Analysis ◽  
Indian Ocean ◽  
Species Level ◽  
Web Architecture ◽  
Evolutionarily Conserved ◽  
The Family ◽  
Behavioural Biology

Phylogenies are underutilised, powerful predictors of traits in unstudied species. We tested phylogenetic predictions of web-related behaviour in Clitaetra Simon, 1889, an Afro-Indian spider genus of the family Nephilidae. Clitaetra is phylogenetically sister to all other nephilids and thus important for understanding ancestral traits. Behavioural information on Clitaetra has been limited to only C. irenae Kuntner, 2006 from South Africa which constructs ladder webs. A resolved species-level phylogeny unambiguously optimised Clitaetra behavioural biology and predicted web traits in five unstudied species and a uniform intrageneric nephilid web biology. We tested these predictions by studying the ecology and web biology of C. perroti Simon, 1894 on Madagascar and C. episinoides Simon, 1889 on Mayotte. We confirm predicted arboricolous web architecture in these species. The expected ontogenetic allometric transition from orbs in juveniles to elongate ladder webs in adults was statistically significant in C. perroti, whereas marginally not significant in C. episinoides. We demonstrate the persistence of the temporary spiral in finished Clitaetra webs. A morphological and behavioural phylogenetic analysis resulted in unchanged topology and persisting unambiguous behavioural synapomorphies. Our results support the homology of Clitaetra hub reinforcement with the nephilid hub-cup. In Clitaetra, behaviour was highly predictable and remained consistent with new observations. Our results confirm that nephilid web biology is evolutionarily conserved within genera.

Two new species ofSyllis(Polychaeta: Syllidae) from South Africa, one of them viviparous, with remarks on larval development and vivipary

2014 ◽  
Vol 94 (4) ◽  
pp. 729-746 ◽  
Author(s):  
Carol Simon ◽  
Guillermo San Martín ◽  
Georgina Robinson
Keyword(s):  
South Africa ◽  
New Species ◽  
South African ◽  
The Other ◽  
Coralline Algae ◽  
Colour Pattern ◽  
The Family ◽  
Two New Species ◽  
Haliotis Midae ◽  
Characteristic Colour

Two new species of South African Syllidae of the genusSyllisLamarck, 1818 are described.Syllis unzimasp. nov. is characterized by having unidentate compound chaetae with long spines on margin, a characteristic colour pattern and its reproduction by vivipary. Vivipary is not common among the polychaetes, but most representatives occur in the family Syllidae Grube, 1850 (in five otherSyllisspecies, two species ofDentatisyllisPerkins, 1981 and two species ofParexogoneMesnil & Caullery, 1818).Syllis unzimasp. nov. differs from the other viviparous species in having large broods (>44 juveniles) which develop synchronously. Development of the juveniles is similar to that of free-spawningSyllisspecies, but the appearance of the first pair of eyespots and the differentiation of the pharynx and proventricle occur later inS. unzima.Syllis amicarmillarissp. nov., is characterized by having an elongated body with relatively short, fusiform dorsal cirri and the presence of one or two pseudosimple chaeta on midbody parapodia by loss of blade and enlargement of shaft.Syllis unzimasp. nov. was found in high densities on culturedHolothuria scabraJaeger, 1833 with single specimens found on a culturedCrassostrea gigasThunberg, 1793 and on coralline algae, respectively, whileS. amicarmillariswas found mainly in sediment outside an abalone farm and less frequently on culturedHaliotis midaeLinnaeus, 1758. We discuss the possible benefits of the association withH. scabratoS. unzimasp. nov.

Three new species of oribatid mites of the family Galumnidae (Acari, Oribatida) from South Africa

Zootaxa ◽  
2021 ◽  
Vol 4920 (1) ◽  
pp. 91-100
Author(s):  
SERGEY G. ERMILOV ◽  
ELIZABETH A. HUGO-COETZEE ◽  
ALEXANDER A. KHAUSTOV
Keyword(s):  
South Africa ◽  
New Species ◽  
Body Size ◽  
Oribatid Mites ◽  
Eastern Cape Province ◽  
Eastern Cape ◽  
The Family ◽  
Three New Species ◽  
Porose Area ◽  
Median Pore

Three new species of oribatid mites of the family Galumnidae are described from soil and coniferous litter of Hogsback State Forest, Eastern Cape Province, South Africa. Pilogalumna hogsbackensis sp. nov. differs from Pilogalumna tenuiclava and P. ornatula by the presence of elongate oval postanal porose area and narrowly unilaterally dilated bothridial head. Pergalumna amatholensis sp. nov. differs from Pergalumna distincta by the presence of smaller body size, rounded rostrum, unilaterally dilated bothridial head, one pair of notogastral porose areas Aa, and the localization of opisthonotal gland opening and lyrifissure im. Stictozetes ihaguensis sp. nov. differs from all species of the genus by presence of bothridial seta with narrowly dilated head and median pore in both genders. An identification key to known species of Stictozetes is presented. 

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