NDLI: Biofilm growth and nitrogen uptake responses to increases in nitrate and ammonium availability

Content Provider	Springer Nature Link
Author	Ribot, Miquel Schiller, Daniel Sabater, Francesc Martí, Eugènia
Copyright Year	2015
Abstract	Nitrate (NO3 −) and ammonium (NH4 +) are the two major dissolved inorganic nitrogen (DIN) species available in streams. Human activities increase stream DIN concentrations and modify the NO3 −:NH4 + ratio. However, few studies have examined biofilm responses to enrichment of both DIN species. We examined biofilm responses to variation in ambient concentrations and enrichments in either NO3 − or NH4 +. We incubated nutrient diffusing substrata (NDS) bioassays with three treatments (DIN-free, +NO3 − and +NH4 +) in five streams. Biomass-specific uptake rates (U spec ) of NO3 − and NH4 + were then measured using in situ additions of 15N-labeled NO3 − and NH4 +. Biomass (estimated from changes in carbon content) and algal accrual rates, as well as U spec -NO3 − of biofilms in DIN-free treatments varied among the streams in which the NDS had been incubated. Higher ambient DIN concentrations were only correlated with enhanced biofilm growth rates. U spec -NO3 − was one order of magnitude greater and more variable than U spec -NH4 +, however similar relative preference index (RPI) suggested that biofilms did not show a clear preference for either DIN species. Biofilm growth and DIN uptake in DIN-amended NDS (i.e., +NO3 − and +NH4 +) were consistently lower than in DIN-free NDS (i.e., control). Lower values in controls with respect to amended NDS were consistently more pronounced for algal accrual rates and U spec -NO3 − and for the +NH4 + than for the +NO3 − treatments. In particular, enrichment with NH4 + reduced biofilm U spec -NO3 − uptake, which has important implications for N cycling in high NH4 + streams.
Starting Page	695
Ending Page	707
Page Count	13
File Format	PDF
ISSN	10151621
Journal	Aquatic Sciences
Volume Number	77
Issue Number	4
e-ISSN	14209055
Language	English
Publisher	Springer Basel
Publisher Date	2015-08-13
Publisher Place	Basel
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nitrogen Biofilm Uptake Ammonium Nitrate Stream Freshwater & Marine Ecology Marine & Freshwater Sciences Oceanography Ecology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Water Science and Technology Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Contrasts among macrophyte riparian species in their use of stream water nitrate and ammonium: insights from 15N natural abundance

Ammonium, nitrate and phytoplankton interactions in a freshwater tidal estuarine zone: potential effects of cultural eutrophication

Influence of transient storage on stream nutrient uptake based on substrata manipulation

Nitrogen retention in a floodplain backwater of the upper Mississippi River (USA)

Implications of flow intermittency on sediment nitrogen availability and processing rates in a Mediterranean headwater stream

Contraction, fragmentation and expansion dynamics determine nutrient availability in a Mediterranean forest stream

Nutrient uptake and macroinvertebrate community structure in a highly regulated Mediterranean stream receiving treated wastewater

Exposure of dissolved organic matter to UV-radiation increases bacterial growth efficiency in a clear-water Alpine stream and its adjacent groundwater

Variation in nitrate uptake and denitrification rates across a salinity gradient in Mediterranean semiarid streams

Biofilm growth and nitrogen uptake responses to increases in nitrate and ammonium availability

Similar Documents

Contrasts among macrophyte riparian species in their use of stream water nitrate and ammonium: insights from 15N natural abundance

Ammonium, nitrate and phytoplankton interactions in a freshwater tidal estuarine zone: potential effects of cultural eutrophication

Influence of transient storage on stream nutrient uptake based on substrata manipulation

Nitrogen retention in a floodplain backwater of the upper Mississippi River (USA)

Implications of flow intermittency on sediment nitrogen availability and processing rates in a Mediterranean headwater stream

Contraction, fragmentation and expansion dynamics determine nutrient availability in a Mediterranean forest stream

Nutrient uptake and macroinvertebrate community structure in a highly regulated Mediterranean stream receiving treated wastewater

Exposure of dissolved organic matter to UV-radiation increases bacterial growth efficiency in a clear-water Alpine stream and its adjacent groundwater

Variation in nitrate uptake and denitrification rates across a salinity gradient in Mediterranean semiarid streams

Biofilm growth and nitrogen uptake responses to increases in nitrate and ammonium availability