Search Results - (Author, Cooperation:R. Sukumar)
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1Latest Papers from Table of Contents or Articles in PressW. F. Laurance ; D. C. Useche ; J. Rendeiro ; M. Kalka ; C. J. Bradshaw ; S. P. Sloan ; S. G. Laurance ; M. Campbell ; K. Abernethy ; P. Alvarez ; V. Arroyo-Rodriguez ; P. Ashton ; J. Benitez-Malvido ; A. Blom ; K. S. Bobo ; C. H. Cannon ; M. Cao ; R. Carroll ; C. Chapman ; R. Coates ; M. Cords ; F. Danielsen ; B. De Dijn ; E. Dinerstein ; M. A. Donnelly ; D. Edwards ; F. Edwards ; N. Farwig ; P. Fashing ; P. M. Forget ; M. Foster ; G. Gale ; D. Harris ; R. Harrison ; J. Hart ; S. Karpanty ; W. J. Kress ; J. Krishnaswamy ; W. Logsdon ; J. Lovett ; W. Magnusson ; F. Maisels ; A. R. Marshall ; D. McClearn ; D. Mudappa ; M. R. Nielsen ; R. Pearson ; N. Pitman ; J. van der Ploeg ; A. Plumptre ; J. Poulsen ; M. Quesada ; H. Rainey ; D. Robinson ; C. Roetgers ; F. Rovero ; F. Scatena ; C. Schulze ; D. Sheil ; T. Struhsaker ; J. Terborgh ; D. Thomas ; R. Timm ; J. N. Urbina-Cardona ; K. Vasudevan ; S. J. Wright ; G. J. Arias ; L. Arroyo ; M. Ashton ; P. Auzel ; D. Babaasa ; F. Babweteera ; P. Baker ; O. Banki ; M. Bass ; I. Bila-Isia ; S. Blake ; W. Brockelman ; N. Brokaw ; C. A. Bruhl ; S. Bunyavejchewin ; J. T. Chao ; J. Chave ; R. Chellam ; C. J. Clark ; J. Clavijo ; R. Congdon ; R. Corlett ; H. S. Dattaraja ; C. Dave ; G. Davies ; M. Beisiegel Bde ; N. da Silva Rde ; A. Di Fiore ; A. Diesmos ; R. Dirzo ; D. Doran-Sheehy ; M. Eaton ; L. Emmons ; A. Estrada ; C. Ewango ; L. Fedigan ; F. Feer ; B. Fruth ; J. G. Willis ; U. Goodale ; S. Goodman ; J. C. Guix ; P. Guthiga ; W. Haber ; K. Hamer ; I. Herbinger ; J. Hill ; Z. Huang ; I. F. Sun ; K. Ickes ; A. Itoh ; N. Ivanauskas ; B. Jackes ; J. Janovec ; D. Janzen ; M. Jiangming ; C. Jin ; T. Jones ; H. Justiniano ; E. Kalko ; A. Kasangaki ; T. Killeen ; H. B. King ; E. Klop ; C. Knott ; I. Kone ; E. Kudavidanage ; J. L. Ribeiro ; J. Lattke ; R. Laval ; R. Lawton ; M. Leal ; M. Leighton ; M. Lentino ; C. Leonel ; J. Lindsell ; L. Ling-Ling ; K. E. Linsenmair ; E. Losos ; A. Lugo ; J. Lwanga ; A. L. Mack ; M. Martins ; W. S. McGraw ; R. McNab ; L. Montag ; J. M. Thompson ; J. Nabe-Nielsen ; M. Nakagawa ; S. Nepal ; M. Norconk ; V. Novotny ; S. O'Donnell ; M. Opiang ; P. Ouboter ; K. Parker ; N. Parthasarathy ; K. Pisciotta ; D. Prawiradilaga ; C. Pringle ; S. Rajathurai ; U. Reichard ; G. Reinartz ; K. Renton ; G. Reynolds ; V. Reynolds ; E. Riley ; M. O. Rodel ; J. Rothman ; P. Round ; S. Sakai ; T. Sanaiotti ; T. Savini ; G. Schaab ; J. Seidensticker ; A. Siaka ; M. R. Silman ; T. B. Smith ; S. S. de Almeida ; N. Sodhi ; C. Stanford ; K. Stewart ; E. Stokes ; K. E. Stoner ; R. Sukumar ; M. Surbeck ; M. Tobler ; T. Tscharntke ; A. Turkalo ; G. Umapathy ; M. van Weerd ; J. V. Rivera ; M. Venkataraman ; L. Venn ; C. Verea ; C. V. de Castilho ; M. Waltert ; B. Wang ; D. Watts ; W. Weber ; P. West ; D. Whitacre ; K. Whitney ; D. Wilkie ; S. Williams ; D. D. Wright ; P. Wright ; L. Xiankai ; P. Yonzon ; F. Zamzani
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-07-27Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Agriculture/statistics & numerical data ; Animals ; *Biodiversity ; Conservation of Natural Resources/*statistics & numerical data ; Data Collection ; Ecology/statistics & numerical data ; Endangered Species/*statistics & numerical data ; Environmental Pollution/adverse effects/statistics & numerical data ; Fires/statistics & numerical data ; Forestry/statistics & numerical data ; Interviews as Topic ; Mining/statistics & numerical data ; Population Growth ; Rain ; Reproducibility of Results ; Research Personnel ; Surveys and Questionnaires ; Temperature ; Trees/*physiology ; *Tropical ClimatePublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 0039-9140Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 0003-3472Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesLearning behavior and changes in the levels of RNA during learning in grasshopper, Poecilocera pictaStaff View
ISSN: 0091-6773Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyPsychologyType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] SIR - The contention of Jesse H. Au-subel (Nature 350, 649; 1991) that the world need not worry unduly about climate change because it has developed or can develop the technology for adaptation sounds rather hollow in developing countries. Those who have the money and the technology may be able to ...Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesSukumar, R. ; Ramesh, R. ; Pant, R. K. ; Rajagopalan, G.
[s.l.] : Nature Publishing Group
Published 1993Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The use of stable carbon isotope ratios as palaeoclimatic indicators is based on the different ecological requirements of the C3 and C4 plant types that have widely differing 13C/12C ratios. C3 and C4 plants, separated on the basis of their photosynthetic pathways of carbon fixation, typically have ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Key wordsRattus rattus ; Small mammals ; Community structure ; Insular populations ; Patch sizeSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: bstract Small mammals were studied in insular montane forest patches in the Upper Nilgiris in southern India from February 1994 to September 1996. Nine patches were selected at two sites, one with a single large 600-ha patch, the other with several small patches ranging in size from 0.2 to 60 ha. The population characteristics and community structure of small mammals were studied in relation to patch size and habitat structure within the patches. The two most abundant species were Rattus rattus (2–36 individuals/ha) and Suncus montanus (0–11 individuals/ha), while the abundance of seven other species recorded were very low. The population characteristics of R. rattus examined were density, biomass, proportions of juveniles, sub-adults and adults, mean weight of all animals, mean weight of adults, sex ratio and persistence. The proportion of adults, sub-adults, mean weight of animals, and mean weight of adult males were correlated with patch size. Persistence of sub-adult females in the large patch was especially high. The density and biomass of other small-mammal species were also studied. Two indices of diversity, species richness and proportion of R.␣rattus were compared as measures of community structure. Seven habitat characteristics were measured; of these, canopy cover, canopy height and tree density were correlated with the size of the patch. Density and biomass of species other than R. rattus and proportion of R. rattus were correlated with canopy height. Density and biomass of species other than R. rattus were highest in smaller patches. While the population characteristics of R. rattus may be affected by patch size, the density of rare species may be influenced by factors related to lower canopy height. Migration between patches may be an important factor in maintaining populations in these patches.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Stable carbon isotopes ; Collagen ; Diet ; Asian elephant ; Elephas maximusSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary Stable carbon isotope ratios in bone collagen have been used in a variety of dietary studies in modern and fossil animals, including humans. Inherent in the stable isotope technique is the assumption that the isotopic signature is a reflection of the diet and is persistent in collagen because this is a relatively inert protein. Carbon isotope analyses of bones from a southern Indian population of Asian elephant (Elephas maximus), a long-lived mammal that alternates seasonally between a predominantly C3 (browse) and C4 (grass) plant diet, showed two patterns that have important implications for dietary interpretation based on isotopic studies. Relative to the quantity of the two plant types consumed on average, the δ13C signal in collagen indicated that more carbon was incorporated from C3 plants, possibly due to their higher protein contribution. There was a much greater variance in δ13C values of collagen in sub-adult (range -10.5‰ to-22.7‰, variance=14.51) compared to adult animals (range -16.0‰ to -20.3‰, variance=1.85) pointing to high collagen turnover rates and non-persistent isotopic signatures in younger, growing animals. It thus seems important to correct for any significant relative differences in nutritive value of food types and also consider the age of an animal before drawing definite conclusions about its diet from isotope ratios.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Phenology ; Leaf flushing ; Insect herbivory ; Tropical deciduous forests ; Southern IndiaSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract Patterns of leaf-flushing phenology of trees in relation to insect herbivore damage were studied at two sites in a seasonal tropical dry forest in Mudumalai, southern India, from April 1988 to August 1990. At both sites the trees began to flush leaves during the dry season, reaching a peak leaf-flushing phase before the onset of rains. Herbivorous insects emerged with the rains and attained a peak biomass during the wet months. Trees that flushed leaves later in the season suffered significantly higher damage by insects compared to those that flushed early or in synchrony during the peak flushing phase. Species whose leaves were endowed with physical defenses such as waxes suffered less damage than those not possessing such defenses. There was a positive association between the abundance of a species and leaf damage levels. These observations indicate that herbivory may have played a major role in moulding leaf flushing phenology in trees of the seasonal tropics.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesGopinathan, Mambully C. ; Babu, Cherukuri R. ; Chatterjee, Sukumar R. ; Abrol, Yash P.
Springer
Published 1987Staff ViewISSN: 1573-9104Keywords: quantitative variation ; fractions of seed proteins ; amino acid composition ; Vigna minima ; Vigna umbellataSource: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Abstract Quantitative variation in different fractions of seed proteins and their amino acid levels in populations ofVigna minima (Roxb.) Ohwi and Ohashi and inV. umbellata cv. IC 1568 — the rice bean — were investigated. Globulin I fraction, together with globulin II, constitutes 38 to 54 per cent of the total seed protein. The alkali soluble (glutelin) fraction is the second largest fraction. Both these fractions show broad range of variation, suggesting a broad genetic base. The profiles are population specific; the coastal population, which contains higher seed protein also possesses maximum levels of globulin I and glutelin fraction suggesting its potentiality for breeding lines with high protein content, high nutritive value, and salt tolerance. Protein content is positively correlated with globulin I and glutelin fractions, which are in turn positively correlated with each other. The amino acid profiles are specific not only to the fractions but also to the populations. The range of variation in the levels of all amino acids in different fractions is broad suggesting substantial genetic diversity. The average levels of lysine and sulphur amino acids are high in globulin I and glutelin fractions.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesGopinathan, Mambully C. ; Babu, Cherukuri R. ; Chatterjee, Sukumar R. ; Abrol, Yash P.
Springer
Published 1987Staff ViewISSN: 1573-9104Keywords: seeds ; protein content ; amino acid composition ; yield components ; populations ; Vigna minima ; Vigna umbellataSource: Springer Online Journal Archives 1860-2000Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: Abstract The seed protein content and amino acid composition of 14 natural populations and their three-generation progenies (grown in different locations) belonging toVigna minima (Roxb.) Ohwi & Ohashi and ofV. umbellata cv IC 1568 have been investigated. The populations ofV. minima were sampled from different ecozones of Western Ghats of Kerala and Tamil Nadu (India). The range of variation in protein levels is narrow, but the protein content of the coastal population is higher than the rice bean suggesting its breeding potential for high protein and salt tolerant lines of rice bean. Although the seed protein content shows genotype × environment interaction, there is a substantial genetic variability among the populations. The tenuous relationship between protein content and yield conponents suggest the presence of correlation breakers which can be utilized in breeding programmes of rice bean. There is a broad genetic base in the levels of essential amino acids, and the range of variation observed is higher than that recorded for different species ofVigna andPhaseolus. The wild relative is nutritionally as good as or superior to the cultigen.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1573-1480Keywords: Climate Change ; India ; Tropical forest ; Impacts and adaptationSource: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsNotes: Abstract India has 64 Mha under forests, of which 72% are tropical moist deciduous, dry deciduous, and wet evergreen forest. Projected changes in temperature, rainfall, and soil moisture are considered at regional level for India under two scenarios, the first involving greenhouse gas forcing, and the second, sulphate aerosols. Under the former model, a general increase in temperature and rainfall in all regions is indicated. This could potentially result in increased productivity, and shift forest type boundaries along attitudinal and rainfall gradients, with species migrating from lower to higher elevations and the drier forest types being transformed to moister types. The aerosol model, however, indicates a more modest increase in temperature and a decrease in precipitation in central and northern India, which would considerably stress the forests in these regions. Although India seems to have stabilized the area under forest since 1980, anthropogenic stresses such as livestock pressure, biomass demand for fuelwood and timber, and the fragmented nature of forests will all affect forest response to changing climate. Thus, forest area is unlikely to expand even if climatically suitable, and will probably decrease in parts of northeast India due to extensive shifting cultivation and deforestation. A number of general adaptation measures to climate change are listed.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1573-5117Keywords: Cerithidea cingulata ; substratum ; preference ; distributionSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Abstract The behavioural reaction of a tropical estuarine gastropod, Cerithidea cingulata (Gmelin), to different types of substrata was investigated by subjecting the snails to different mixtures of natural sediment. In addition the organic matter in the sediments was estimated, and an attempt has also been made to relate these results to the distribution of snails in the field.Type of Medium: Electronic ResourceURL: