geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Preliminary testing of the Integrated Habitat Assessment System (IHAS) for aquatic macroinvertebrates


, : Preliminary testing of the Integrated Habitat Assessment System (IHAS) for aquatic macroinvertebrates. African Journal of Aquatic Science, 311: 1-14

Preliminary testing of the Integrated Habitat Assessment System (IHAS), a widely-used aquatic macroinvertebrate habitat assessment method in South Africa, was undertaken. Based on the sensitivity of the South African Scoring System (SASS) to biotope availability and assuming that SASS Scores at minimally-impacted reference sites are the highest Scores attainable, one would expect to find a positive relationship between SASS Scores and IHAS scores at reference sites. The preliminary testing undertaken is based on the assumption that this relationship should be linear. For data obtained from reference sites in Mpumalanga and the Western Cape, non-parametric correlation analyses were undertaken between SASS4/5 Scores and IHAS scores, using Kendall's Rank-correlation Coefficient. Separate analyses were undertaken for different geomorphological zones and biotope groups. Results were generally unsatisfactory, with non-significant correlations (P > 0.05) for two-thirds of the data sets analysed. Performance of the IHAS varied between geomorphological zones and biotope groups, with best results obtained for the Foothill: Gravel-bed Zone in Mpumalanga, particularly with the stones-in-current biotope analysed separately. Further testing is required to confirm the relative performance in different bioregions/ecoregions, geomorphological zones and biotope groups.

US$19.90

DOI: 10.2989/16085910609503866


Other references

Ahern-Rindell, A.J.; Murnane, R.D.; Prieur, D.J., 1989: Interspecific genetic complementation analysis of human and sheep fibroblasts with beta-galactosidase deficiency. Interspecific somatic cell hybrids were analyzed by genetic complementation to determine if a lysosomal storage disease in sheep associated with deficiencies of beta-galactosidase and alpha-neuraminidase was homologous with any of four beta-galact...

Sakao, Y.; Kawai, T.; Takeuchi, O.; Copeland, N.G.; Gilbert, D.J.; Jenkins, N.A.; Takeda, K.; Akira, S., 2000: Mouse proteasomal ATPases Psmc3 and Psmc4: genomic organization and gene targeting. PSMC3 and PSMC4, components of the 19S complex of the 26S proteasome, show a significant degree of amino acid similarity, especially in the conserved ATPase domain (CAD). In this study, we characterized the mouse Psmc3 and Psmc4 genes. The genomic...

Pawowski, Bogumi, 1963: The systematic scheme of European species of the genus Delphinium. All the European Delphinium spp. can be divided into the 3 sects, differentiated by De Candolle: Delphinastrum, Delphinium (= Delphinellum), and Staphisagria. Sect. Delphinastrum contains 15 spp. divided by the author into 2 subsects: (1) Elatoide...

Richardson, D.W.; Nunamaker, D.M., 1991: Evaluation of plate luting, using an in vivo ovine osteotomy model. Bilateral, midshaft metacarpal osteotomies were performed in 11 sheep and bilateral, midshaft radial osteotomies were performed in 7 sheep. The lesions were repaired with bone plates. One of each pair of plates was luted with polymethylmethacrylat...

Romano, S.T.; Bordieri, J.E., 1989: Physical attractiveness stereotypes and students' perceptions of college professors. This study examined the effect of physical attractiveness of college professors on students' forming impressions of them. 60 high school students answered questions about alleged professors, who varied in physical attractiveness and sex. Anal...

Tarafdar J.C.; Roy A.B., 1981: Urease and phosphatase in the rhizospheres of different mesta hibiscus sp genotypes. The distribution of urease, acid and alkaline phosphatases [important in N and P nutrition] under field conditions at different ages of 9 mesta [H. sabdariffa, H. radiatus, H. pendurafurmis, H. acetosella, H. fungense] genotypes was investigated....

Deljou, A.; Karami, O.; Esna Ashari, M., 2007: Effect of mannitol on growth of embryogenic callus-derived somatic embryos of carnation (Dianthus caryophyllus L.). In vitro regeneration of four carnation cultivars, namely Nelson, Impulse, Sagres and Spitit, through somatic embryogenesis was studied. MS culture medium was supplemented with 30 g sucrose, 2 mg 2,4-D and 0.2 mg BA/litre and used for embryogenic...

Sekhar, L.N.; D.O.iveira, E., 1999: Cranial microsurgery Approaches and techniques. This book is a textbook on the topic of the surgical treatment of intracranial pathologies. The 43 individually authored chapters in this volume are grouped under the headings general techniques, anterior cranial fossa and orbit, middle cranial fo...

Klotzsche, A.; van der Kruk, J.; Linde, N.; Doetsch, J.; Vereecken, H., 2013: 3-D characterization of high-permeability zones in a gravel aquifer using 2-D crosshole GPR full-waveform inversion and waveguide detection. Reliable high-resolution 3-D characterization of aquifers helps to improve our understanding of flow and transport processes when small-scale structures have a strong influence. Crosshole ground penetrating radar (GPR) is a powerful tool for chara...

von Klitzing, L.; Klink, F.; Grosspietzsch, R.; Graf, G.; Oberheuser, F., 1981: Computerized analysis of CTG and intrauterine measured tcpO2 of the fetus. Journal of Perinatal Medicine 9 Suppl 1: 116-117