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Authors Rodrigo, MA; Calero, S
Author Full Name Rodrigo, Maria A.; Calero, Sara
Title Phenology of macrophytes in coastal environments: Utricularia australis (R. Br.) and Stuckenia pectinata (L.) Borner in an interdunal pond within the Albufera de Valencia Natural Park
Source LIMNETICA
Language English
Document Type Article
Author Keywords Aquatic angiosperms; Mediterranean ecosystems; carnivorous plant; life-cycles; growing degree-days (GDD)
Keywords Plus POTAMOGETON-PECTINATUS; SUBMERGED MACROPHYTES; AQUATIC PLANTS; SPATIAL-DISTRIBUTION; CHARA-HISPIDA; REPRODUCTION; CONSERVATION; DISPERSAL; COUNTRIES; PATTERNS
Abstract Macrophytes are key elements for biodiversity in Mediterranean ponds and coastal lagoons. To predict the long-term persistence of aquatic plant populations in a changing environment is essential to understand their phenology, i.e. the timing of ecological processes coupled with environmental factors. Utricularia australis and Stuckenia pectinata (=Potamogeton pectinatus) populations growing in a brackish interdunal pond within the Albufera de Valencia Natural Park were monitored over three years. We describe their life-cycles under shallow conditions and relate them to accumulated heat and radiation. U. australis overwintered as turions; turion germination happened in February at 125-210 growing degree-days (GDD), at a daily mean temperature (DMT) of 10-11 degrees C, and with 150-220 hours of accumulated sunshine (h Sun). The flowering period started in June (2450 GDD, 26 degrees C DMT, 1365 h Sun), but only in 2014 and in the sunniest areas of the pond. The turion formation started in early August (3800-4000 GDD, 20-28 degrees C DMT, 1900-2180 h Sun). A reduction in U. australis biomass and coverage was observed throughout time. S. pectinata exhibited a perennial population restricted to the pond deeper basins. It initiated its life-cycle in late February-early March, mainly by re-sprouting from old stems and roots, vigorously producing new shoots with green leaves (400-440 GDD, 11-12 degrees C DMT, 300-380 h Sun). In early May, the production of the first spikes was detected (840-1045 GDD, 17-18 degrees C DMT, 820-900 h Sun). By mid-June, fertilization was complete and drupelet growth began (1430-1800 GDD, 20-23 degrees C DMT, 1190-1230 h Sun). Increased salinity and competition with charophytes developed in the pond, negatively affected the fertility and abundance dynamics of S. pectinata. U. australis performance declined with the reduction in free-water surface due to the expansion of helophytes, mainly cattails. The S. pectinata life-cycle in this pond fits in with the latitudinal pattern of a prolonged life-cycle with a delayed reproduction for southern populations. The restoration of degraded or destroyed aquatic ecosystems is a turning point for local populations to recover, but some management of the restored waterbodies is required to guarantee the preservation of peculiar and endangered species. In situ continuous monitoring of water temperature, and other relevant variables for submerged vegetation (such as light availability and salinity), is needed to have a more precise image of the environmental factor values required to pass from one phenological event to another, and for a better comparison among populations from different origins.
Author Address [Rodrigo, Maria A.; Calero, Sara] Univ Valencia, Integrat Ecol Lab Ecol Ethol & Evolut E3 Grp, Cavanilles Inst Biodivers & Evolutionary Biol, Catedrat Jose Beltran 2, E-46980 Valencia, Spain
Reprint Address Rodrigo, MA (corresponding author), Univ Valencia, Integrat Ecol Lab Ecol Ethol & Evolut E3 Grp, Cavanilles Inst Biodivers & Evolutionary Biol, Catedrat Jose Beltran 2, E-46980 Valencia, Spain.
E-mail Address maria.a.rodrigo@uv.es
ResearcherID Number Calero, Sara/AAA-2016-2021
ORCID Number Calero, Sara/0000-0001-6030-504X
Funding Agency and Grant Number Spanish Ministry of Education, Culture and Sport [FPU13/02254]
Funding Text This work was supported by the Spanish Ministry of Education, Culture and Sport [grant FPU13/02254] to S.C. Local and regional authorities facilitated permission to study the pond and the species (Oficina Tecnica Devesa-Albufera, Ajuntament de Valencia; Servei de Parcs Naturals i Servei de Vida Silvestre, Generalitat Valenciana). We would like to thank all our colleagues and students who helped during the samplings, and the IIAMA laboratory (UPV) for performing the nutrient analyses. Daniel Sheerin (Online English S.C.), a native English teacher who specializes in scientific English, reviewed and corrected the English language in the manuscript. We also acknowledge the suggestions of two anonymous referees to help improve the manuscript.
Times Cited 1
Total Times Cited Count (WoS, BCI, and CSCD) 1
Publisher ASOC ESPAN LIMNOL-MISLATA
Publisher City MISLATA (VALENCIA)
Publisher Address C/ LOS ANGELES, 33, MISLATA (VALENCIA), SPAIN
ISSN 0213-8409
29-Character Source Abbreviation LIMNETICA
ISO Source Abbreviation Limnetica
Year Published 2019
Volume 38
Issue 1
Beginning Page 317
Ending Page 334
Digital Object Identifier (DOI) 10.23818/limn.38.05
Page Count 18
Web of Science Category Limnology; Marine & Freshwater Biology
Subject Category Marine & Freshwater Biology
Document Delivery Number HJ4XN
Unique Article Identifier WOS:000457181700020
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