The morphological adaptations of horse fly larvae (Diptera: Tabanidae) to developmental sites in the Palearctic Region and their relationship to the evolution and distribution of the family

1989 ◽  
Vol 67 (9) ◽  
pp. 2286-2293 ◽  
Author(s):  
R. V. Andreeva
Keyword(s):  
Habitat Type ◽  
Morphological Features ◽  
Mountain Streams ◽  
High Mountain ◽  
Morphological Adaptations ◽  
The Family ◽  
Fly Larvae ◽  
Phylogenetic Lineages ◽  
Nearctic Region ◽  
Horse Fly

Horse fly larvae occur in diverse biotopes, not only in swampy habitats, but also in lakes, ponds, and mountain streams, as well as in high mountain forests and meadows. An analysis of the morphology of horse fly larvae from all known biotopes has revealed that morphological features are correlated with habitat type. Published articles and monographs that treat the taxonomy and morphology of larvae of the Tabanidae, particularly in the Nearctic Region, demonstrate the morphological features of adaptive significance. However, these works do not relate habitat type directly to morphological adaptations. Horse fly larvae are here grouped as ecological types, based on their external anatomy rather than on accepted phylogenetic lineages. The ability of tabanid larvae to adapt to different biotopes has influenced the geographic distribution and perhaps the evolution of taxa of this family.

Caddisfly assemblages of high mountain streams (The High Tatra Mts, Slovakia) influenced by a major windstorm event

Biologia ◽  
2013 ◽  
Vol 68 (3) ◽  
Author(s):  
Daniela Kalaninová ◽  
Eva Bulánková ◽  
Ferdinand Šporka
Keyword(s):  
Negative Correlation ◽  
Control Site ◽  
Mountain Streams ◽  
High Mountain ◽  
Passive Filter ◽  
The Family ◽  
Tatra Mts ◽  
Feeding Structure ◽  
Filter Feeders ◽  
The High Tatras

AbstractHydrobiological research of high mountain streams in the High Tatras was carried out in 2009–2010. We evaluated the influence of windstorm on caddisfly assemblages. To assess the influence of windstorm we focused on river morphology using the RHS method and evaluation of TAM, TOM and BOM (CPOM, FPOM, UFPOM) amount in seven streams. Site 1 was a control and the other six were disturbed by the windstorm in different ways. The most remarkable differences compared to the control site was in feeding structure at sites most affected by erosion. In these streams there was a noticeable dominance of predators from the family Rhyacophilidae (mainly Rhyacophila tristis; sites 3, 4, 5, 6) and a remarkable decrease of passive filter feeders (site 4, 5). Using Spearman coefficient we confirmed a positive correlation between the proportion of predators and amount of TAM caused by erosion of steep deforested slopes of windstorm affected sites. In contrast, we did not observe such an increase in the proportion of predators at site 7, which was affected by both windstorm and subsequently by fire. This might be explained by the shallow vee valley with no observed erosion, where this site is situated. We also found a negative correlation between predators and evenness, indicating unstable community structure clearing succesion in the streams disturbed by erosion, and a negative correlation between passive filter feeders and UFPOM. We found out that overhanging tree boughs and LWD had an influence on species composition. RHS was a useful tool in characterising the influence of hydromorphology on caddisfly assemblages.

scholarly journals Analysis of Morphological Features and Flavonoid Compositions of Crabapple Exposed to 60Coγ Radiation Treatments

2018 ◽  
Vol 46 (1) ◽  
pp. 82-89
Author(s):  
Yanfen LU ◽  
Suxiao HAO ◽  
Hui GENG ◽  
Yuncong YAO
Keyword(s):  
Nutritive Value ◽  
Morphological Characteristics ◽  
Morphological Features ◽  
Aflp Analysis ◽  
Germplasm Resources ◽  
Dna Diversity ◽  
The Family ◽  
Rosaceae Family ◽  
Flavonoid Composition ◽  
Radiation Treatments

Flavonoids are important secondary metabolites, whose content and composition such as anthocyanin and flavonol have been associated with fruit quality and affect fruit coloration. Crabapple (Malus spp.), with rich color and nutritive value, belongs to the family M. genus of the Rosaceae family, and it is widely used in landscape for its rich flavonoid compositions. Radiation mutagenesis breeding may increase the gene mutation frequency and enhance diversity of species, so it is a predominant approach for plant germplasm innovation. However, the changes of crabapple morphological characteristics and flavonoid compositions by radiation are not clear. In this study, we employed 60Coγ radiation to M.cv. ‘Royalty’ crabapple, and then surveyed the changes of leaves and flowers in the growth and morphology traits, color parameters, flavonoid composition, and the genetic diversity. The result found that 60Coγ radiation decreased plant height, stem diameter and leaf and flower areas. And it promoted the flavonoids accumulation in leaves, but inhibited that in flowers. Additionally, 60Coγ radiation improved DNA diversity. W60-7, W40-2 and W40-5 plants showed clear phenotypic variation by AFLP analysis. These results provide evidence that mutagenesis breeding may change the morphological features and flavonoid compositions, and expand crabapple germplasm resources and improve its application value. 

scholarly journals Effects of Multiple Use on Water Quality of High-Mountain Watersheds: Bacteriological Investigations of Mountain Streams

1971 ◽  
Vol 22 (6) ◽  
pp. 1048-1054 ◽  
Author(s):  
David G. Stuart ◽  
Gary K. Bissonnette ◽  
Thomas D. Goodrich ◽  
William G. Walter
Keyword(s):  
Water Quality ◽  
Mountain Streams ◽  
High Mountain ◽  
Multiple Use ◽  
Mountain Watersheds

scholarly journals Metacommunity Structures of Macroinvertebrates and Diatoms in High Mountain Streams, Yunnan, China

2020 ◽  
Vol 8 ◽  
Author(s):  
Angelika L. Kurthen ◽  
Fengzhi He ◽  
Xiaoyu Dong ◽  
Alain Maasri ◽  
Naicheng Wu ◽  
...  
Keyword(s):  
Mountain Streams ◽  
High Mountain

scholarly journals Cypselar diversity in four species of Senecio L. (Asteraceae)

2014 ◽  
Vol 21 (1) ◽  
pp. 13-17
Author(s):  
Tulika Talukdar ◽  
Sobhan Kumar Mukherjee
Keyword(s):  
Morphological Characters ◽  
Flowering Plants ◽  
Morphological Features ◽  
Phenotypic Information ◽  
Important Member ◽  
The Family ◽  
Plant Taxon ◽  
Specific Concept

The genus Senecio L. is one of the largest genera of flowering plants and is an important member of the tribe Senecioneae (Asteraceae). Phenotypic information, including a broad range of morphological characters is very crucial for phylogenetic reconsideration of any family, tribe or genus. In the family Asteraceae, very little attention has been paid to cypselar diversity, though it is regarded as taxonomically valuable. A sincere attempt has been made to study detailed cypselas macro and micro-morphological features of four species of Senecio L. These diacritical features could be used to strengthen current inter-specific concept of Senecio L.DOI: http://dx.doi.org/10.3329/bjpt.v21i1.19251Bangladesh J. Plant Taxon. 21(1): 13-17, 2014 (June)

Iospilids (Polychaeta: Iospilidae) from the northwest Caribbean Sea, with observations on reproductive structures

Zootaxa ◽  
2006 ◽  
Vol 1211 (1) ◽  
pp. 53 ◽  
Author(s):  
SOLEDAD JIMÉNEZ-CUETO ◽  
EDUARDO SUÁREZ-MORALES ◽  
SERGIO I. SALAZAR-VALLEJO
Keyword(s):  
Caribbean Sea ◽  
Common Species ◽  
Eastern Coast ◽  
Reproductive Process ◽  
Morphological Variations ◽  
Reproductive Structures ◽  
Morphological Adaptations ◽  
The Family ◽  
Mode Of Life ◽  
The Caribbean

Iospilids are a small, inconspicuous group of holopelagic polychaetes that dwell in the upper layers of tropical, temperate, and cold waters of the world. Representatives of this interesting and infrequent group were collected during four oceanographic cruises off the eastern coast of the Yucatan Peninsula, northwest Caribbean Sea. Three of the four species currently known in the family were recorded: Iospilus phalacroides Viguier, 1886, Phalacrophorus pictus Greeff, 1879, and P. uniformis Reibisch, 1895. The latter was the most common species in the area; it occurred during the four cruises and represented more than 92% of the total iospilid specimens caught; it was slightly more abundant in nighttime samples. New observations of reproduction-related morphological variations and sexual dimorphism are presented for P. uniformis. These may be regarded as morphological adaptations to the planktic mode of life thus favouring the efficiency of the reproductive process in the water column. These are the first records of the family Iospilidae in the Caribbean Basin. Revised generic and species diagnoses, taxonomic illustrations and notes, and an identification key are given here for the species recorded in the Caribbean.

scholarly journals Mobile Elements in Ray-Finned Fish Genomes

Life ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 221 ◽  
Author(s):  
Federica Carducci ◽  
Marco Barucca ◽  
Adriana Canapa ◽  
Elisa Carotti ◽  
Maria Assunta Biscotti
Keyword(s):  
Deep Sea ◽  
Genetic Resource ◽  
Phenotypic Diversity ◽  
Mountain Streams ◽  
High Mountain ◽  
Model Group ◽  
Biological Interest ◽  
Wide Range ◽  
Molecular Bases

Ray-finned fishes (Actinopterygii) are a very diverse group of vertebrates, encompassing species adapted to live in freshwater and marine environments, from the deep sea to high mountain streams. Genome sequencing offers a genetic resource for investigating the molecular bases of this phenotypic diversity and these adaptations to various habitats. The wide range of genome sizes observed in fishes is due to the role of transposable elements (TEs), which are powerful drivers of species diversity. Analyses performed to date provide evidence that class II DNA transposons are the most abundant component in most fish genomes and that compared to other vertebrate genomes, many TE superfamilies are present in actinopterygians. Moreover, specific TEs have been reported in ray-finned fishes as a possible result of an intricate relationship between TE evolution and the environment. The data summarized here underline the biological interest in Actinopterygii as a model group to investigate the mechanisms responsible for the high biodiversity observed in this taxon.

scholarly journals New ridged, conical, fissiculate blastoid from the Permian of Timor

2013 ◽  
Vol 87 (6) ◽  
pp. 1071-1076
Author(s):  
James Sprinkle ◽  
Johnny A. Waters
Keyword(s):  
Twentieth Century ◽  
New Genus ◽  
Morphological Features ◽  
Rugose Coral ◽  
The Family

Permian rocks from the Indonesian island of Timor contain an abundant and diverse pelmatozoan echinoderm fauna that was extensively monographed in the first half of the twentieth century. Recent collections have produced specimens of Corrugatoblastus savilli, n. gen. n. sp., the first new genus of blastoid described from Timor in 70 years. Corrugatoblastus savilli is a ridged and furrowed, conical, fissiculate blastoid with a highly unusual thecal morphology mimicking a small, solitary, rugose coral. We have placed C. savilli in the Family Codasteridae, although it has several morphological features that are unique when compared to other genera in the family and to other blastoid genera regardless of familial assignment.

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