Journal of the North American Benthological Society最新文献

{"title":"Prevalence and clinical profile of celiac disease in children with type 1 diabetes mellitus.","authors":"Rajesh Joshi, Monica Madvariya","doi":"10.4103/2230-8210.167555","DOIUrl":"10.4103/2230-8210.167555","url":null,"abstract":"<p><strong>Objective: </strong>To determine the prevalence of celiac disease (CD) in children with type 1 diabetes mellitus (TIDM) in follow-up in a Tertiary Care Referral Centre in Western India and to describe the clinical features indicative of CD in screened patients of TIDM.</p><p><strong>Study design: </strong>In this single center observational cross-sectional study, 71 children who were diagnosed with TIDM were subjected to screening for CD with tissue transglutaminase antibody testing. Those who tested positive were offered intestinal biopsy for the confirmation of diagnosis. Clinical profiles of both groups of patients were compared and manifestations of CD were delineated.</p><p><strong>Results: </strong>The study revealed the prevalence of CD (based on serology) in children with Type 1 diabetes as 15.49%. The prevalence of biopsy-confirmed CD was 7.04%. Of the diagnosed CD patients, one-third were symptomatic at the time of screening while the majority was asymptomatic. The major clinical features indicative of CD were intestinal symptoms, anemia, rickets, and short stature. Autoimmune thyroid disease was prevalent in 29.6% of the patients with TIDM followed by CD.</p><p><strong>Conclusions: </strong>The high prevalence of CD in children with Type 1 diabetes emphasizes the need for routine screening programs to be in place for these high-risk populations. The clinical profile of patients with CD further elaborates the indicators of CD and the need to screen for them.</p>","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"19 1","pages":"797-803"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4673809/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90527428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flow in culverts as a potential mechanism of stream fragmentation for native and nonindigenous crayfish species","authors":"Hannah R. Foster, T. Keller","doi":"10.1899/10-096.1","DOIUrl":"https://doi.org/10.1899/10-096.1","url":null,"abstract":"Abstract Habitat fragmentation and nonindigenous species are 2 of the leading causes of species loss globally. Thus, scientific information is needed to assess their interactive effects on the biota of lotic ecosystems. We tested the hypothesis that culverts (i.e., pipes) at road–stream intersections elevate flow velocities and differentially slow upstream locomotion of native relative to nonindigenous crayfishes. We: 1) mapped culvert locations and measured their flow; 2) quantified movement of Orconectes propinquus (native) in culverts with velocities of 2, 31, and 42 cm/s; 3) compared the movement of Orconectes rusticus (nonindigenous), O. propinquus, and Orconectes virilis (native) in a culvert with velocity of 30 cm/s; and 4) used a recirculating flume to determine the water velocity that impeded upstream movement (impedance velocity) of each species. Culverts had higher velocities than upstream riffles during baseflow conditions. Orconectes propinquus moved upstream in culverts with flows >30 cm/s, but individuals slipped more frequently and traveled slower than those tested at 2 cm/s. Orconectes rusticus moved upstream faster in culverts and had an impedance velocity ∼6 cm/s faster than O. propinquus (34.0 ± 1.2 cm/s, mean ± 1 SE) and ∼8 cm/s faster than O. virilis (32.0 ± 1.1 cm/s). Culverts impeded crayfish upstream movement differently among species. Nonindigenous species tolerated higher flows, so culverts may create a filter that favors the spread of invasive species. Culverts should be designed to keep water velocity <30 cm/s to mitigate flow effects on crayfish passage, thereby minimizing the possible combined effects of fragmentation and nonindigenous species introductions.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"103 1","pages":"1129 - 1137"},"PeriodicalIF":0.0,"publicationDate":"2011-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76763636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms and potential implications of fragmentation in low-order streams","authors":"T. Keller, E. Snyder, J. Feminella","doi":"10.1899/11-106.1","DOIUrl":"https://doi.org/10.1899/11-106.1","url":null,"abstract":"Ecologists have long known that stream ecosystems require 4-dimensional connectivity (sensu Ward 1989) to sustain natural biodiversity and productivity (Ward and Stanford 1983, Stanford et al. 1996, Olson et al. 2007). That this connectivity is both hydrologically based and significantly altered by human activities is without question (Dynesius and Nilsson 1994, Stanford et al. 1996, Pringle 2001, Bernhardt et al. 2005). The papers in this series describe studies designed to assess or restore hydrologic connectivity in small streams. In a recent review of efficacy of stream restoration, Palmer et al. (2010) reported extremely limited success in increasing benthic biodiversity when restoration efforts were limited to local or proximate spatial scales and advocated a more holistic watershed-scale approach to prioritizing restoration targets (see also Walsh et al. 2005). However, improvement and restoration of flow regimes in ecosystems requires proximate solutions, such as those described herein (i.e., small dam removal and improvements to stream–road crossings), particularly if local ‘fixes’ can be integrated into holistic watershed-improvement plans. The papers in this series provide important findings about how ubiquitous instream structures, such as low-head dams and culverts, affect fishes and largebodied benthic invertebrates and their habitats. Helms et al. (2011) and Gangloff et al. (2011) compared intact, breached, and relict (i.e., entirely removed) mill dams in Alabama (USA). Fish species richness was lower upstream than downstream of intact dams (Helms et al. 2011), and mussel abundance and richness was higher downstream of intact dams than downstream of partial or relict (flow restored) dams. Both groups reported strong negative effects of breached dams, possibly from changes to instream habitat conditions. Collectively, their results provide important insights about how to implement and prioritize dam removal to improve connectivity within small streams (Pringle 2001, Stanley and Doyle 2003). Dams are not the only instream structures that alter physical conditions and have the potential to fragment populations. Culverts at road crossings create barriers to the movement of anadromous fishes (Davis and Davis 2011) and crayfishes (Foster and Keller 2011). Davis and Davis (2011) reported elevated catchper-unit-effort for juvenile salmon upstream of culverts in high-gradient streams (spawning habitats) and downstream of low-gradient, wetland streams (rearing areas) in Alaska. Fish appeared to avoid passing through culverts with high flow velocity. In Michigan streams, elevated flow velocity in culverts limited upstream movement of several crayfish species, and high-flow conditions favored upstream movement of nonindigenous species over native taxa (Foster and Keller 2011). It appeared that restoration efforts could improve fish passage, but culvert restoration projects should be designed individually to achieve sufficiently low-velocity th","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"28 1","pages":"1093 - 1094"},"PeriodicalIF":0.0,"publicationDate":"2011-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83648657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of low-head dams on fish assemblages in streams across Alabama","authors":"B. Helms, David C. Werneke, M. Gangloff, E. Hartfield, J. Feminella","doi":"10.1899/10-093.1","DOIUrl":"https://doi.org/10.1899/10-093.1","url":null,"abstract":"Abstract We quantified fish assemblages in 20 streams containing mill dams in various physical conditions (dams intact, partially breached, or relict with normal flows) in Alabama, USA, during the period from 2006 to 2008. We used a backpack electroshocker to sample three 150-m reaches per stream: 500 to 1000 m downstream of the dam, 0 to 100 m downstream of the dam, and 100 m upstream of the impoundment. Species- and trait-based analyses revealed slightly different, but often complementary, information about fish assemblages. Fish species richness and benthic conditions differed longitudinally among reaches in streams with dams. In streams with breached dams, species richness, but not trait richness, was lower in upstream reaches than in downstream reaches. Overall, species and trait richness were correlated with benthic-habitat variables in streams with relict dams and were significantly correlated with water physicochemical variables in streams with intact and breached dams. Nonmetric multidimensional scaling ordination failed to resolve any discernable site groupings based on species abundance data, and indicator species analysis revealed 1 indicator species, Esox americanus, upstream of relict dams. Fourth-corner trait analysis revealed more trait associations in reaches in streams with breached dams than in those with intact or relict dams. Generalist spawners (nest-guarding polyphils) increased and taxa with a preference for cobble substrates decreased upstream of breached dams. Few longitudinal differences were observed in streams with relict and intact dams. Taken together, dams, particularly those that are breached, appear to exert a strong upstream influence on fish species richness and functional composition and could alter the trophic structure of the entire stream through habitat modifications or limitation of fish movements.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"5 1","pages":"1095 - 1106"},"PeriodicalIF":0.0,"publicationDate":"2011-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85193993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Editorial: A New Title for J-NABS","authors":"P. Silver","doi":"10.1899/30.4.E.1138.1","DOIUrl":"https://doi.org/10.1899/30.4.E.1138.1","url":null,"abstract":"On 25 May 2011, the members of the North American Benthological Society (NABS) voted to change the name of their society to Society for Freshwater Science (SFS) and to change the title of the society’s journal from Journal of the North American Benthological Society (J-NABS) to Freshwater Science (FWS). For many of us who have been long-time members of NABS and authors or users of J-NABS, these changes were made with regret, but recognition of the need for change was overwhelming (,80% of those members present voted for change). Thus, it is my responsibility to inform you—2 y after publishing the 25 Anniversary Issue of J-NABS—that this will be the last issue of this journal published under the title, Journal of the North American Benthological Society. It also is my pleasure to announce that in March 2012, you will read the first issue of this journal to be published under the title, Freshwater Science. The search for a new title was motivated by several concerns. The original title reflected the name of the journal’s publisher (NABS) rather than the journal’s scope or content. It gave the unintentional impression of being geographically and geopolitically exclusionary and scientifically restricted. Thus, the original title did not encourage submission of international and interdisciplinary papers, especially those at the interface of benthology (the study of organisms and processes related to the bottoms of water bodies) and other freshwater sciences. It also was not transparent to readers and users outside the field of benthology, including academic administrators, government officials, and national and international committees that rank scientific journals. The new title reflects the interests of members of SFS and the scope of scientific research currently being published in the journal. It is, we think, more transparent and inviting than the original title. A new title provides an opportunity for close inspection of the mission of the Journal and careful assessment of the scope of its content. The content of the journal is rooted in benthology because the origin of NABS (and thus SFS) was the Midwest Benthological Society. The journal came to be associated particularly with the study of streams because many NABS members study streams. However, the interests of society members have widened over the 26 y since the first issue of J-NABS was published to include many other aquatic sciences than benthology and far more systems than streams. Consequently, the scope of the science published in the journal has broadened significantly (see J-NABS 29/1 for a sense of the breadth of the science now being published in the journal). Thus, we anticipate that few actual changes in scope will be associated with the change in title from J-NABS to FWS. However, we do need to update our statement of the scientific content of the journal. The details of this redefinition will be the subject of an editorial in the first issue of FWS (31/1), to be published in M","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"24 1","pages":"1138 - 1138"},"PeriodicalIF":0.0,"publicationDate":"2011-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81743584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Associations between small dams and mollusk assemblages in Alabama streams","authors":"M. Gangloff, E. Hartfield, David C. Werneke, J. Feminella","doi":"10.1899/10-092.1","DOIUrl":"https://doi.org/10.1899/10-092.1","url":null,"abstract":"Abstract Small dams are ubiquitous yet poorly understood features in many streams. Dam removal is being used increasingly in stream restoration projects as a means to enhance habitat connectivity and ecosystem function. However, habitat- and assemblage-level effects of small dams on stream mollusk assemblages are poorly documented. We examined associations between stream physicochemical habitat variables and mollusk assemblages at 22 small (<10 m) dams in 3rd–5th order Alabama streams. We sampled 66 reaches (3 reaches/dam) associated with intact, breached, and relict small dams. For each dam, we designated 3 study reaches: 1) immediately downstream from the dam, 2) 500 to 5000 m downstream, and 3) 500 to 5000 m upstream from the impounded or formerly impounded zone. We used principal components analysis (PCA) to examine variation in physical-habitat conditions across all sites. Four principal components accounted for ∼72% of the variation in physical-habitat conditions across sites. One PC score (PC1, corresponding to increased substrate size) was negatively associated with several mollusk metrics including total mussel abundance, taxon richness, catch-per-unit-effort (CPUE), and density. We observed few significant differences between simple habitat variables at sites up- and downstream of dams. However, streams with intact dams had significantly higher mussel catch rates (CPUE) and taxon richness than did streams with breached or relict dams. We used forward-stepwise multiple regression to model the effects of habitat variables (as standardized PC scores) on mollusk assemblage metrics. PCs representing substrate composition were the strongest predictors of total mussel abundance and richness. Abundance of other mollusks including deposit-feeding snails, the exotic bivalve Corbicula fluminea, and fingernail clams was correlated with PC scores describing variability in substrate organic matter composition or stream gradient. We think these data indicate that some intact dams enhance mollusk habitat in downstream reaches. Streams with intact dams appear to be more geomorphically stable than streams with breached or relict dams and conditions in the mill reach may reflect preconstruction stream conditions. Breached dams warrant higher prioritization for removal than intact structures because habitat degradation may persist for decades and impede re-establishment of native mollusk populations.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"130 1","pages":"1107 - 1116"},"PeriodicalIF":0.0,"publicationDate":"2011-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80254779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of stream-crossing structures on the distribution of rearing juvenile Pacific salmon","authors":"Jeffrey C. Davis, G. A. Davis","doi":"10.1899/10-090.1","DOIUrl":"https://doi.org/10.1899/10-090.1","url":null,"abstract":"Abstract The effects of barriers to migration by adult salmon smolt have been well studied, but effects to migration of juvenile salmon during freshwater residency have not been evaluated thoroughly. We tested for differences in the relative abundance of juvenile Pacific salmon upstream and downstream of road-crossing culverts in 10 streams, 5 with moderate (upland) and 5 with low (wetland) slope. We compared stream width, bed slope, and substrate in natural channels and culverts; measured culvert water velocity during base flow; and obtained maximum and minimum culvert velocities using the flow time of dissolved solutes. We compared flow velocities to swimming speeds of rearing juvenile salmon to evaluate potential passage of fish through culverts. In upland streams with spawning adults, catch-per-unit-trap (CPUT) of juvenile coho salmon was often 2 to 3× greater above than below culverts. In these reaches, downstream migration of salmon fry from spawning locations may be limited by culvert flow velocities that exceed burst swimming speeds of juveniles. Where 2 upland crossing structures were replaced with culverts that replicated natural channel slopes, widths, and substrate, flow velocities decreased and differences in coho salmon CPUT were eliminated. In wetland streams with adult spawning reduced or absent above the crossing, CPUT of juveniles was greater below than above culverts where the outlet was perched. Thus, culverts can influence upstream and downstream fish movement and altered the distribution of rearing fish within streams.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"8 1","pages":"1117 - 1128"},"PeriodicalIF":0.0,"publicationDate":"2011-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76571389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of environmental factors and dredging on chironomid larval diversity in urban drainage systems in polders strongly influenced by seepage from large rivers","authors":"K. Vermonden, K. Brodersen, D. Jacobsen, H. V. van Kleef, G. van der Velde, R. Leuven","doi":"10.1899/10-047.1","DOIUrl":"https://doi.org/10.1899/10-047.1","url":null,"abstract":"Abstract.  Interest in the biodiversity value of urban waters is growing. Understanding key ecological processes is essential for effective management of these aquatic ecosystems. Our paper focuses on identifying the key factors that structure chironomid assemblages, such as water quality and dredging, in urban waters strongly influenced by seepage of large rivers. Chironomid assemblages were studied in urban surface-water systems (man-made drainage ditches) in polder areas along lowland reaches of the rivers Rhine–Meuse in The Netherlands. Multivariate analysis was used to identify the key environmental factors. Taxon richness, Shannon index (H′), rareness of species, and life-history strategies at urban locations were compared with available data from similar man-made water bodies in rural areas, and the effectiveness of dredging for restoring chironomid diversity in urban waters was tested. Three different chironomid associations were distinguished by Two-Way Indicator Species Analysis. Variation within and among chironomid associations were significantly related to substrate (sludge layer and substrate type: sand vs clay), % cover of lemnids, submerged vegetation, filamentous algae, and water transparency. Chironomid taxon richness and H′ were similar in urban and rural waters, probably because of their similar hydrologic, morphologic, and water-quality conditions and their similar dredging and weed-control regimes. Rareness was slightly higher in urban than in rural waters. In urban water systems, chironomid taxon richness was negatively related to sludge layer and % cover of lemnids. Dredging changed chironomid species composition, and increased taxon richness and life-history strategies indicative of good O2 conditions. Therefore, dredging can be regarded as an effective measure to restore diversity of chironomid communities in urban waters affected by nutrient-rich seepage or inlet of river water.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"7 1","pages":"1074 - 1092"},"PeriodicalIF":0.0,"publicationDate":"2011-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79041024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Algal bioassessment metrics for wadeable streams and rivers of Maine, USA","authors":"T. Danielson, C. Loftin, Leonidas Tsomides, Jeanne L. DiFranco, B. Connors","doi":"10.1899/10-162.1","DOIUrl":"https://doi.org/10.1899/10-162.1","url":null,"abstract":"Abstract.  Many state water-quality agencies use biological assessment methods based on lotic fish and macroinvertebrate communities, but relatively few states have incorporated algal multimetric indices into monitoring programs. Algae are good indicators for monitoring water quality because they are sensitive to many environmental stressors. We evaluated benthic algal community attributes along a landuse gradient affecting wadeable streams and rivers in Maine, USA, to identify potential bioassessment metrics. We collected epilithic algal samples from 193 locations across the state. We computed weighted-average optima for common taxa for total P, total N, specific conductance, % impervious cover, and % developed watershed, which included all land use that is no longer forest or wetland. We assigned Maine stream tolerance values and categories (sensitive, intermediate, tolerant) to taxa based on their optima and responses to watershed disturbance. We evaluated performance of algal community metrics used in multimetric indices from other regions and novel metrics based on Maine data. Metrics specific to Maine data, such as the relative richness of species characterized as being sensitive in Maine, were more correlated with % developed watershed than most metrics used in other regions. Few community-structure attributes (e.g., species richness) were useful metrics in Maine. Performance of algal bioassessment models would be improved if metrics were evaluated with attributes of local data before inclusion in multimetric indices or statistical models.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"1 1","pages":"1033 - 1048"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76624722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Life table vs secondary production analyses—relationships and usage in ecology","authors":"A. Benke, M. Whiles","doi":"10.1899/11-007.1","DOIUrl":"https://doi.org/10.1899/11-007.1","url":null,"abstract":"Abstract.  The life table is a well known approach for understanding populations and has appeared in general ecology textbooks for >60 y. Secondary production is associated with energy flow, but methods rarely appear in texts. Our objectives were to: 1) demonstrate conceptual/analytical relationships between secondary production and life tables, 2) use a real example of pond-breeding salamanders to illustrate how the 2 approaches can be integrated, and 3) use publication frequency analysis to determine trends and biases for each approach within ecological (particularly aquatic) subdisciplines. The example illustrated that both approaches incorporate age- or stage-specific survivorship. The main difference is that life tables are used to calculate production of offspring with age-specific fecundity, and production analyses are used to calculate production of biomass with mass-specific increments. Publication frequency analysis over 12 y demonstrated that 78% more papers used life tables (698) than production (393) overall, but 50% more papers used production (353) than life tables (236) in basic research. Furthermore, production was studied primarily in aquatic (98%), mostly benthic (77%), environments. Life tables were used primarily in terrestrial environments (65%). Recognizing the relatedness of these concepts and usage biases may explain philosophical differences and help bridge gaps between terrestrial–aquatic and population–ecosystem ecologists.","PeriodicalId":49987,"journal":{"name":"Journal of the North American Benthological Society","volume":"48 1","pages":"1024 - 1032"},"PeriodicalIF":0.0,"publicationDate":"2011-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81380579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}