Long-term coexistence between the macroalga Caulerpa prolifera and the seagrass Cymodocea nodosa in a Mediterranean lagoon
نویسندگان
چکیده
The potential negative influence of the seaweed Caulerpa prolifera on seagrass Cymodocea nodosa was explored in a Mediterranean coastal lagoon (Mar Menor, Spain) where alga suddenly and rapidly spread four decades ago. An extensive field sampling carried out across to characterise distribution abundance both macrophytes at different spatial scales, as well sediment characteristics. Generalised linear additive models were performed whole-lagoon scale, for deep shallow bottoms, independently, explore factors influencing C. abundance. A high-spatial-resolution macrophyte map also generated by integrating underwater imaging, direct visualisations orthophotographs. This showed that largely dominated ecosystem but with opposing depth patterns mainly reflected their specific light requirements. dominant depths grew intermingled dense bed over large areas seafloor highly anoxic muddy sediments. Models did not reveal overall relationships between macrophytes, indicating main driver this lagoon. Findings highlighted absence or indirect nodosa, supported fact distributions similar those reported 1980s, just few years after had We conclude, therefore, is progressively replacing ecosystem, species have coexisted decades.
منابع مشابه
Short-term growth and biomechanical responses of the temperate seagrass Cymodocea nodosa to CO2 enrichment
Seagrasses are often regarded as climate change ‘winners’ because they exhibit higher rates of photosynthesis, carbon fixation and growth when exposed to increasing levels of ocean acidification. However, questions remain whether such growth enhancement compromises the biomechanical properties of the plants, altering their vulnerability to structural damage and leaf loss. Here, we investigated ...
متن کاملGrowth and sediment space occupation by seagrass Cymodocea nodosa roots
The development, growth, and space occupation by the canopy and rhizosphere of a temperate Mediterranean seagrass meadow of Cymodocea nodosa, and the possible effects of meadow seasonal development on sediment redox conditions, were examined during the 1998 growth season. The meadow supported maximum biomass of leaves and rhizomes during July, and maximum root biomass in August. The meadow main...
متن کاملthe effects of keyword and context methods on pronunciation and receptive/ productive vocabulary of low-intermediate iranian efl learners: short-term and long-term memory in focus
از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...
15 صفحه اولthe relationship between learners critical thinking ability and their performance in the reading sections of the tofel and ielts test
the study reflected in this thesis aims at finding out relationships between critical thinking (ct), and the reading sections of tofel and ielts tests. the study tries to find any relationships between the ct ability of students and their performance on reading tests of tofel and academic ielts. however, no research has ever been conducted to investigate the relationship between ct and the read...
15 صفحه اولa comparative study of the relationship between self-, peer-, and teacher-assessments in productive skills
تمایل به ارزیابی جایگزین و تعویض آن با آزمون سنتی مداد و کاغذ در سالهای اخیر افزایش یافته است. اکثر زبان آموزان در کلاس های زبان از نمره نهایی که استاد تعیین میکند ناراضی اند. این تحقیق جهت بررسی ارزیابی در کلاس های زبان انگلیسی به هدف رضایتمندی زبان آموزان از نمره هایشان انجام گرفته است که در آن نمرات ارائه شده توسط سه گروه ارزیاب (ارزیابی خود دانشجو، همسالان واستاد) در مهارت های تولید (تکل...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Aquatic Botany
سال: 2021
ISSN: ['0304-3770', '1879-1522']
DOI: https://doi.org/10.1016/j.aquabot.2021.103415