Evidence for consumer regulation of biofilm–nutrient interactions among hardwater streams (Pennsylvania, USA)
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| Title: | Evidence for consumer regulation of biofilm–nutrient interactions among hardwater streams (Pennsylvania, USA) |
|---|---|
| Authors: | Eckert, Rebecca A.1, Carrick, Hunter J.1,2 carri1h@cmich.edu |
| Source: | Hydrobiologia. Jan2014, Vol. 721 Issue 1, p183-198. 16p. |
| Subjects: | Biofilms, Nutrient interactions, Biotic communities, Food chains, Ecosystems, Chironomidae |
| Geographic Terms: | Pennsylvania |
| Abstract: | Experimental studies evaluating the simultaneous effects of consumers, nutrients, and other biotic/abiotic factors on intact, natural food webs are rare, particularly among ecosystems of varying trophic conditions. We conducted a series of in situ studies that used nutrient-diffusing substrata with nitrogen (N) and phosphorus (P) concentrations in a full factorial design in three temperate, limestone streams in Pennsylvania across a trophic gradient (mesotrophic, eutrophic, and hypereutrophic streams). We assessed differences in algal and macroinvertebrate biomass, taxonomic composition, and functional groups relative to amended nutrients across the trophic gradient; as such, these results facilitated predictions about regulators of food web structure. All factors varied significantly among the streams (e.g., algal biomass P = 0.005, macroinvertebrate biomass P < 0.001, algal diversity P = 0.006, macroinvertebrate diversity P < 0.001, algal group P < 0.001, macroinvertebrate guilds P < 0.001); the streams, however, did not exhibit simple responses to nutrient amendment. Algal and macroinvertebrate biomass and diversity responded greatest in the mesotrophic stream while grazing seemed to be a strong factor preventing algal nutrient response in the eutrophic and hypereutrophic streams. Brillouin’s Evenness Index was most influenced by nutrient amendment (nutrient effect on algae and macroinvertebrates P = 0.021). As such, we concluded that biomass and diversity were mediated by complexity within intermediate trophic levels. [ABSTRACT FROM AUTHOR] |
| Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 92047655 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evidence for consumer regulation of biofilm–nutrient interactions among hardwater streams (Pennsylvania, USA) – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Eckert%2C+Rebecca+A%2E%22">Eckert, Rebecca A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Carrick%2C+Hunter+J%2E%22">Carrick, Hunter J.</searchLink><relatesTo>1,2</relatesTo><i> carri1h@cmich.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Hydrobiologia%22">Hydrobiologia</searchLink>. Jan2014, Vol. 721 Issue 1, p183-198. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Biofilms%22">Biofilms</searchLink><br /><searchLink fieldCode="DE" term="%22Nutrient+interactions%22">Nutrient interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Biotic+communities%22">Biotic communities</searchLink><br /><searchLink fieldCode="DE" term="%22Food+chains%22">Food chains</searchLink><br /><searchLink fieldCode="DE" term="%22Ecosystems%22">Ecosystems</searchLink><br /><searchLink fieldCode="DE" term="%22Chironomidae%22">Chironomidae</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Pennsylvania%22">Pennsylvania</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Experimental studies evaluating the simultaneous effects of consumers, nutrients, and other biotic/abiotic factors on intact, natural food webs are rare, particularly among ecosystems of varying trophic conditions. We conducted a series of in situ studies that used nutrient-diffusing substrata with nitrogen (N) and phosphorus (P) concentrations in a full factorial design in three temperate, limestone streams in Pennsylvania across a trophic gradient (mesotrophic, eutrophic, and hypereutrophic streams). We assessed differences in algal and macroinvertebrate biomass, taxonomic composition, and functional groups relative to amended nutrients across the trophic gradient; as such, these results facilitated predictions about regulators of food web structure. All factors varied significantly among the streams (e.g., algal biomass P = 0.005, macroinvertebrate biomass P < 0.001, algal diversity P = 0.006, macroinvertebrate diversity P < 0.001, algal group P < 0.001, macroinvertebrate guilds P < 0.001); the streams, however, did not exhibit simple responses to nutrient amendment. Algal and macroinvertebrate biomass and diversity responded greatest in the mesotrophic stream while grazing seemed to be a strong factor preventing algal nutrient response in the eutrophic and hypereutrophic streams. Brillouin’s Evenness Index was most influenced by nutrient amendment (nutrient effect on algae and macroinvertebrates P = 0.021). As such, we concluded that biomass and diversity were mediated by complexity within intermediate trophic levels. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10750-013-1699-y Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 183 Subjects: – SubjectFull: Biofilms Type: general – SubjectFull: Nutrient interactions Type: general – SubjectFull: Biotic communities Type: general – SubjectFull: Food chains Type: general – SubjectFull: Ecosystems Type: general – SubjectFull: Chironomidae Type: general – SubjectFull: Pennsylvania Type: general Titles: – TitleFull: Evidence for consumer regulation of biofilm–nutrient interactions among hardwater streams (Pennsylvania, USA) Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Eckert, Rebecca A. – PersonEntity: Name: NameFull: Carrick, Hunter J. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 00188158 Numbering: – Type: volume Value: 721 – Type: issue Value: 1 Titles: – TitleFull: Hydrobiologia Type: main |
| ResultId | 1 |
