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Authors Wittyngham, SS; Moderan, J; Boyer, KE
Author Full Name Wittyngham, Serina Sebilian; Moderan, Julien; Boyer, Katharyn E.
Title Temperature and salinity effects on submerged aquatic vegetation traits and susceptibility to grazing
Source AQUATIC BOTANY
Language English
Document Type Article
Author Keywords Ampithoe; Potamogeton; Plant-Herbivore interactions; Climate change; San Francisco Bay
Keywords Plus CHEMICAL DEFENSES; MACROPHYTES; HERBIVORY; STOICHIOMETRY; RESTORATION; PREFERENCE; NITROGEN; MARINE; GROWTH; CARBON
Abstract Submerged macrophyte vegetation provides valuable ecosystem services, but climate- and management-driven changes may alter plant traits in unexpected and interactive ways. Further, such changes in plant traits may influence herbivore response, with feedback to bed characteristics. We manipulated temperature (20, 25, 30 degrees C) and salinity (0, 6, 12) in mesocosms to simulate current and predicted scenarios for the San Francisco Bay area. We measured traits of Stuckenia pectinata (sago pondweed) and subsequent effects on invertebrate (amphipod, Ampithoe valida) grazing. Counter to predictions, higher temperatures tended to have positive effects on plant traits (leaf area, aboveground biomass, nitrogen [N], phosphorus [P], protein, and total phenolic content). Also, unexpectedly, the highest salinity treatment had few negative effects except when temperature was coolest; L e., 20 degrees C and a salinity of 12 led to decreased carbon [C], N, P, protein, phenolic concentrations, and aboveground biomass. Conversely, the highest salinity (12) at the highest temperature (30 degrees C) produced the highest leaf N and P, and plants from this treatment suffered most from herbivory. Consumption rates significantly increased with lower leaf fiber and higher total leaf N and protein content; i.e., plants with more nutritious leaves and less structural defense were consumed most. Climate change is expected to increase both salinity and temperature, but manipulation of freshwater supply could lead to decreased salinity. The range of responses in S. pectinata traits and invertebrate grazing shown by our results imply that the specific combination and magnitude of human influences will differentially shape these submerged macrophyte beds and their functions.
Author Address [Wittyngham, Serina Sebilian; Moderan, Julien; Boyer, Katharyn E.] San Francisco State Univ, Estuary & Ocean Sci Ctr, 3150 Paradise Dr, Tiburon, CA 94920 USA; [Wittyngham, Serina Sebilian] Coll William & Mary, Virginia Inst Marine Sci, 1375 Grease Rd, Gloucester Point, VA 23062 USA
Reprint Address Wittyngham, SS (corresponding author), San Francisco State Univ, Estuary & Ocean Sci Ctr, 3150 Paradise Dr, Tiburon, CA 94920 USA.; Wittyngham, SS (corresponding author), Coll William & Mary, Virginia Inst Marine Sci, 1375 Grease Rd, Gloucester Point, VA 23062 USA.
E-mail Address sswittyngham@vims.edu
ORCID Number Sebilian Wittyngham, Serina/0000-0002-1421-9690
Funding Agency and Grant Number The Presidio Trust; CSU COAST (California State University Council on Ocean Affairs, Science, and Technology); San Francisco State University; CALFED Ecosystem Restoration Program [E1183007]; CSU (California State University) Sally Casanova Pre-Doctoral Fellowship
Funding Text This work was supported by The Presidio Trust, CSU COAST (California State University Council on Ocean Affairs, Science, and Technology), San Francisco State University, a CSU (California State University) Sally Casanova Pre-Doctoral Fellowship, and the CALFED Ecosystem Restoration Program (grant#E1183007).
Times Cited 5
Total Times Cited Count (WoS, BCI, and CSCD) 5
Publisher ELSEVIER
Publisher City AMSTERDAM
Publisher Address RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN 0304-3770
29-Character Source Abbreviation AQUAT BOT
ISO Source Abbreviation Aquat. Bot.
Publication Date OCT
Year Published 2019
Volume 158
Article Number 103119
Digital Object Identifier (DOI) 10.1016/j.aquabot.2019.05.004
Page Count 8
Web of Science Category Plant Sciences; Marine & Freshwater Biology
Subject Category Plant Sciences; Marine & Freshwater Biology
Document Delivery Number KS8TB
Unique Article Identifier WOS:000518579600001
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