Abstract
Chlorophyll is a green pigment common to all photosynthetic cells of autotrophic organisms in aquatic or terrestrial environments. Techniques used to quantify this pigment include fluorescence, UV spectrophotometer, chromatography, HPLC, and remote sensing. Determination of the photosynthetic pigment chlorophyll - a (Chl-a), has been used widely in many areas of science. The present study investigated the state of the global scientific literature on Chl-a, determining the countries, approaches, and environments where Chl-a has been studied and the geographic scale used. To obtain this scientometric information, we conducted a study from the Scopus database over a 21-year period from 1990 through 2011. This period saw significant increases in the number of publications (r=0.84 and P < 0.001), different journals where publications appeared (160 journals), major papers with a multidisciplinary character, and a predominance of descriptive approaches with studies conducted in aquatic and marine habitats at a regional scale. The country with the highest number of publications was China (21.64% of total papers; location of study), and the USA had the highest number of authors (19.52% of total papers). The main determining factor for publications was socioeconomic (according to model selection criteria; AIC). This study highlight the multidisciplinary use of Chl-a, and may give some directions to new studies about this pigment.
Highlights
(BJORN et al, 2009)
Quantification of chlorophyll - a (Chl-a) has a over a 21-year period (1990-2011), with the been used as a tool in various fields of knowledge, intention of answering the following questions: i) including bioenergy (SKJANES et al, 2007), What is the temporal trend in the number of studies biotechnology (KOZIOL et al, 2007), botany on Chl-a? ii) Studies on Chl-a are carried out on (THOMAS et al, 2001), ecotoxicology (PEREZ et what scales, which journals and in which al., 2008; SUBASHCHANDRABOSE et al, 2011; environments? iv) In which countries and regions
RIANO et al, 2012), marine ecology (HAWES et are these studies performed? v) What factors al., 2012; THOMAS et al, 2001), limnology determine the scientific production of countries (WETZEL, 2001; HUO et al, 2012), remote sensing where publications on Chl-a appear? In the other (NOVOA et al, 2011; GURLIN et al, 2011) and word determine the influence of Gross Domestic agriculture (KRAUSE et al, 2010; ZHANG et al, Product (GPD), Human Development Index (HDI), 2010; FERNANDEZ-JARAMILLO et al, 2012)
Summary
(BJORN et al, 2009). Quantification of Chl-a has a over a 21-year period (1990-2011), with the been used as a tool in various fields of knowledge, intention of answering the following questions: i) including bioenergy (SKJANES et al, 2007), What is the temporal trend in the number of studies biotechnology (KOZIOL et al, 2007), botany on Chl-a? ii) Studies on Chl-a are carried out on (THOMAS et al, 2001), ecotoxicology (PEREZ et what scales, which journals and in which al., 2008; SUBASHCHANDRABOSE et al, 2011; environments? iv) In which countries and regions. Ii) Studies on Chl-a are carried out on (THOMAS et al, 2001), ecotoxicology V) What factors al., 2012; THOMAS et al, 2001), limnology determine the scientific production of countries (WETZEL, 2001; HUO et al, 2012), remote sensing where publications on Chl-a appear? Chl-a is present in both aquatic and consumption of fertilizers, in scientific production terrestrial environments is used in various areas of of nations. Scientometric techniques can be involving the same from the perspective of having used to quantify scientific production and the types jobs that seek to supply necessary research that have of studies in a certain area
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