scholarly journals Occurrence of Chroococcaceae during rice cultivation in North Bihar, India

1970 ◽  
Vol 16 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Kaushal Kishore Choudhary
Keyword(s):  
Species Richness ◽  
Rice Fields ◽  
Rice Cultivation ◽  
The Family ◽  
Plant Taxon

The species richness of cyanobacteria belonging to the family Chroococcaceae in rice fields of North Bihar, India was studied over a 60-day period. Twenty-eight species representing nine genera were identified. The highest number of 21 species was observed around 30th day against eight and 13 species around 10th and 60th day of rice cultivation, respectively. Aphanocapsa grevillei (Hass.) Rabenh., Aphanothece naegelii Wartm and Microcystis marginata (Menegh.) Kützing were observed from 10th to 60th days of rice cultivation. Keywords: Chroococcaceae; Cyanobacteria; Rice cultivation; North Bihar; India. DOI: 10.3329/bjpt.v16i1.2747 Bangladesh J. Plant Taxon. 16(1): 57-63, 2009 (June)

scholarly journals Pollen characters as taxonomic evidence in some species of Dipsacaceae from Iran

2017 ◽  
Vol 24 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Ebadi-Nahari Mostafa ◽  
Nikzat-Siahkolaee Sedigheh ◽  
Eftekharian Rosa
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Pollen Grain ◽  
Pollen Type ◽  
Upgma Tree ◽  
Pollen Characters ◽  
Exine Ornamentation ◽  
The Family ◽  
The World ◽  
Plant Taxon

Pollen morphology of nine species representing four genera: Cephalaria Schrad, Dipsacus L., Pterocephalus Vaill. and Scabiosa L. of the family Dipsacaceae in Iran has been investigated by means of scanning electron microscopy (SEM). The results showed that pollen grains were triporate and tricolpate. The pollen type of Scabiosa rotata Bieb. (tri- and tetraporate) is the first report in the world. The sizes of pollen grains fall into the classification group magna (pollen grain diameter 50–100 μm). Pollen shapes vary from preoblate to prolate and their polar views were triangulate and lobate. The exine ornamentation varies from gemmate in S. rotata to spinulate in the rest studied species. Species of Scabiosa have been dispersed in UPGMA tree that this confirmed the previous studies about taxonomic problems and species complexity in this genus. These results show the transfer of the some Scabisoa species to Lomelosia Raf. based on palynological characters. Pollen morphology of the family is helpful at the generic and specific level.Bangladesh J. Plant Taxon. 24(2): 129–136, 2017 (December)

Rice fields and modes of rice cultivation between 5000 and 2500 BC in east China

2009 ◽  
Vol 36 (12) ◽  
pp. 2609-2616 ◽  
Author(s):  
Zheng Yunfei ◽  
Sun guoping ◽  
Qin ling ◽  
Li chunhai ◽  
Wu xiaohong ◽  
...  
Keyword(s):  
Rice Fields ◽  
Rice Cultivation ◽  
East China

scholarly journals Birds of the family Motacillidae in Omsk and in the Omsk province: species richness, numbers and distribution

2021 ◽  
pp. 110-118
Author(s):  
O. A. Odintsev ◽  
◽  
A. A. Odintseva ◽  
Keyword(s):  
Species Richness ◽  
Duration Of Stay ◽  
Species Numbers ◽  
The Family

The materials of year-round bird counts conducted by the authors in Omsk from September 2006 to Au-gust 2009 in nine habitats, as well as on the territory of four municipal districts of the Omsk Province from June 1 to August 10, 2020 have been analyzed. The species richness was studied, the analysis of the species numbers and distribution was carried out, and the abundance of Motacillidae on the territory of the studied administrative districts is indicated. Species sketches are given, in the compilation of which special attention is paid to the nature and duration of stay, as well as the distribution of birds by habitat. It was found that the encountered representatives of this family inhabit all studied biotopes, but some spe-cies are not evenly distributed.

The Cretaceous and Paleocene pleurotomariid (Gastropoda: Vetigastropoda) fauna of Seymour Island, Antarctica

2009 ◽  
Vol 83 (5) ◽  
pp. 750-766 ◽  
Author(s):  
M. G. Harasewych ◽  
Anton Oleinik ◽  
William Zinsmeister
Keyword(s):  
Species Richness ◽  
New Zealand ◽  
South America ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
Southern India ◽  
New Combination ◽  
The Family ◽  
The Status ◽  
Seymour Island

Leptomaria antipodensis and Leptomaria hickmanae are described from the Upper Cretaceous [Maastrichtian] Lopez de Bertodano Formation, Seymour Island, and represent the first Mesozoic records of the family Pleurotomariidae from Antarctica. Leptomaria stillwelli, L. seymourensis, Conotomaria sobralensis and C. bayeri, from the Paleocene [Danian], Sobral Formation, Seymour Island, are described as new. Leptomaria larseniana (Wilckens, 1911) new combination, also from the Sobral Formation, is redescribed based on better-preserved material. The limited diversity of the pleurotomariid fauna of Seymour Island is more similar to that of the Late Cretaceous faunas of Australia and New Zealand in terms of the number of genera and species, than to the older, more diverse faunas of South America, southern India, or northwestern Madagascar, supporting the status of the Weddelian Province as a distinct biogeographic unit. The increase in the species richness of this fauna during the Danian may be due to the final fragmentation of Gondwana during this period.

scholarly journals Species Richness of the Family Ericaceae along an Elevational Gradient in Yunnan, China

Forests ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 511 ◽  
Author(s):  
Ji-Hua Wang ◽  
Yan-Fei Cai ◽  
Lu Zhang ◽  
Chuan-Kun Xu ◽  
Shi-Bao Zhang
Keyword(s):  
Species Richness ◽  
Environmental Gradients ◽  
Variation Partitioning ◽  
Elevational Gradient ◽  
Geometric Constraints ◽  
Mean Annual Precipitation ◽  
Mean Annual Temperature ◽  
The Family ◽  
Species Area ◽  
Upper Third

Knowledge about how species richness varies along spatial and environmental gradients is important for the conservation and use of biodiversity. The Ericaceae is a major component of alpine and subalpine vegetation globally. However, little is known about the spatial pattern of species richness and the factors that drive that richness in Ericaceae. We investigated variation in species richness of Ericaceae along an elevational gradient in Yunnan, China, and used a variation partitioning analysis based on redundancy analysis ordination to examine how those changes might be influenced by the mid-domain effect, the species-area relationship, and climatic variables. Species richness varied significantly with elevation, peaking in the upper third of the elevational gradient. Of the factors examined, climate explained a larger proportion of the variance in species richness along the elevational gradient than either land area or geometric constraints. Species richness showed a unimodal relationship with mean annual temperature and mean annual precipitation. The elevational pattern of species richness for Ericaceae was shaped by the combined effects of climate and competition. Our findings contribute to a better understanding of the potential effects of climate change on species richness for Ericaceae.

scholarly journals Inventory of mollusks from the estuary of the Paraíba River in northeastern Brazil

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Silvio Felipe Barbosa Lima ◽  
◽  
Rudá Amorim Lucena ◽  
Galdênia Menezes Santos ◽  
José Weverton Souza ◽  
...  
Keyword(s):  
Species Richness ◽  
Environmental Monitoring ◽  
Local Population ◽  
Abundant Species ◽  
Coastal Ecosystems ◽  
Economic Importance ◽  
Northeastern Brazil ◽  
Marine Mollusks ◽  
The Family

Abstract: Coastal ecosystems of northeastern Brazil have important biodiversity with regard to marine mollusks, which are insufficiently studied. Here we provide an inventory of mollusks from two sites in the estuary of the Paraíba River. Mollusks were collected in 2014 and 2016 on the coast and sandbanks located on the properties of Treze de Maio and Costinha de Santo Antônio. The malacofaunal survey identified 12 families, 20 genera and 21 species of bivalves, 17 families, 19 genera and 20 species of gastropods and one species of cephalopod. Bivalves of the family Veneridae Rafinesque, 1815 were the most representative, with a total of five species. Gastropods of the family Littorinidae Children, 1834 had the greatest species richness. The most abundant species were: Neritina virginea (Linnaeus, 1758), Brachidontes exustus (Linnaeus, 1758), Crassostrea brasiliana (Lamarck, 1819), Cerithium atratum (Born, 1778), Anomalocardia brasiliana (Gmelin, 1791), Parvanachis obesa (C. B. Adams, 1845), Phrontis polygonata (Lamarck, 1822), Littoraria angulifera (Lamarck, 1822), L. flava (King, 1832), Tagelus plebeius (Lightfoot, 1786), Echinolittorina lineolata (d'Orbigny, 1840) and Iphigenia brasiliensis (Lamarck, 1818). The results show that the study area has considerable species richness of Mollusca, requiring environmental monitoring in the region mainly due to the economic importance of some species to the local population.

scholarly journals The genus Microlepia Presl (Dennstaedtiaceae) from Bangladesh

1970 ◽  
Vol 13 (1) ◽  
pp. 21-28
Author(s):  
Momtaz Mahal Mirza
Keyword(s):  
Key Words ◽  
New Record ◽  
The Family ◽  
Plant Taxon

The paper deals with the genus Microlepia Presl of the family Dennstaedtiaceae, which includes 4 species, namely, M. hookeriana (Wall. ex Hook.) Presl, M. strigosa (Thunb.) Presl, M. speluncae (L.) Moore and M. hancei Prantl from Bangladesh, of which last one is a new record. Key words : Microlepia, Dennstidiaceae, Pteridophyte, New record, BangladeshDOI: 10.3329/bjpt.v13i1.590 Bangladesh J. Plant Taxon. 13(1): 21-28, 2006 (June)

scholarly journals Nine new taxa and a new combination in Lauraceae from India and Myanmar

1970 ◽  
Vol 15 (2) ◽  
pp. 89-106
Author(s):  
M. Gangopadhyay
Keyword(s):  
New Taxa ◽  
New Combination ◽  
The Family ◽  
Plant Taxon

Nine new taxa belonging to the genera Actinodaphne Nees, Beilschmiedia Nees, Cinnamomum Schaeff. and Cryptocarya R. Br. of the family Lauraceae are described and illustrated from India and Myanmar. One new combination of the family has also been appended. Keywords: New taxa, Actinodaphne, Beilschmiedia, Cinnamomum, Cryptocarya, New combination, Potameia tirunelvelica, Lauraceae DOI: 10.3329/bjpt.v15i2.1739 Bangladesh J. Plant Taxon. 15(2): 89-106, 2008 (December) 

scholarly journals The genus Pronephrium C. Presl (Thelypteridaceae) from Bangladesh

1970 ◽  
Vol 14 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Momtaz Mahal Mirza
Keyword(s):  
Key Words ◽  
Conservation Measures ◽  
The Family ◽  
Plant Taxon

The paper deals with the genus Pronephrium C. Presl of the family Thelypteridaceae and includes five species, namely P. articulatum (Haulst. & Moore) Holtt., P. lakhimpurensis (Rosenst.) Holtt., P. nudatum (Roxb. ex Griff.) Holtt., P. parishii (Bedd.) Holtt., and P. triphyllum (Sw.) Holtt. from Bangladesh. Descriptions of the species with artificial key, illustrations, distribution and short notes with conservation measures are given here. Key words: Pronephrium, Thelypteridaceae, Pteridophyte, Bangladesh DOI: 10.3329/bjpt.v14i1.521 Bangladesh J. Plant Taxon. 14(1): 37-45, 2007 (June)

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)

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