Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California

Hernández‐Carmona, Gustavo; Riosmena‐Rodríguez, Rafael; Servière‐Zaragoza, Elisa; Ponce‐Díaz, Germán

doi:10.1007/s10811-011-9656-5

Cited by 12 publications

(10 citation statements)

References 33 publications

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“…The relaxation of the spring to late summer upwelling regime along the Iberian Peninsula seems, therefore, to simultaneously affect both nutrient supply and ocean temperatures, with potential consequences for macroalgal eco‐physiology. For example, nutrients directly affect recruitment and survival of juvenile sporophytes of the ‘giant kelp’ Macrocystis pyrifera , particularly during El Niño events, characterized by warm and nutrient‐poor waters (Hernández‐Carmona, Riosmena‐Rodríguez, Serviere‐Zaragoza, & Ponce‐Díaz, ).…”

Section: Introductionmentioning

confidence: 99%

The ‘golden kelp’ Laminaria ochroleuca under global change: Integrating multiple eco‐physiological responses with species distribution models

et al. 2017

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1. The loss of marine foundation species, in particular kelps at temperate latitudes, has been linked to climatic drivers and co-occurring human perturbations. Ocean temperature and nutrients typically covary over local and regional scales and play a crucial role on kelp dynamics. Examining their independent and interactive effects on kelp physiological performance is essential to understand and predict patterns of kelp distribution, particularly under scenarios of global change. 2. Crossed combinations of ocean temperatures and availability of nutrients were experimentally tested on juveniles of the 'golden kelp', Laminaria ochroleuca, from the northwestern Iberian Peninsula. Eco-physiological responses included: survival, growth and total N content. Results were embedded into a Species Distribution Model (SDM), which relates presence records and climatic and non-climatic data to forecast distribution patterns of L. ochroleuca under different climate change scenarios. 3. Temperatures above 24.6°C were lethal irrespective of nutrients. Optimal growth of juvenile sporophytes occurred between 12 and 18°C and no nutrient limitation.The SDM, where ocean temperature was the main predictor of kelp distribution in line with temperature thresholds given by eco-physiological responses, suggests a future expansion towards northern latitudes and a retreat from the southern limit/ boundary of the current distribution. Synthesis.Range-shifting of the golden kelp can have severe ecological impacts at regional and local scales. The expansion or retraction of the species along the European coast seems to be modulated mainly by temperature, but nutrient availability would be a key to maintain optimal physiological performance. Our work highlights that the combination of empirical and modelling approaches is accessible to researchers and crucial to building more robust predictions of ecological and biogeographic responses of habitat-forming species to forecasted environmental change.

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Section: Introductionmentioning

confidence: 99%

The ‘golden kelp’ Laminaria ochroleuca under global change: Integrating multiple eco‐physiological responses with species distribution models

et al. 2017

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“…Hernández‐Carmona et al . (2011) found significant differences in coverage of P. torreyi sampled in the same region, in relation to temperature and nutrient changes associated with El Niño.…”

Section: Discussionmentioning

confidence: 93%

Seasonal and interannual variation of sterols in macrophytes from the Pacific coast of Baja California Peninsula (Mexico)

Servière‐Zaragoza

Hurtado‐Oliva

Mazariegos-Villarreal

et al. 2020

Phycological Research

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SUMMARY The seasonal and interannual proximate and sterol composition were assessed in two red (Gelidium robustum, Gelidiaceae and Gracilariopsis sjoestedtii, Gracilariaceae), two brown (Ecklonia arborea, Lessoniaceae and Macrocystis pyrifera, Laminariaceae), and two green (Ulva lactuca and Ulva clathrata, Ulvaceae) macroalgae species and the seagrass Phyllospadix torreyi (Zosteraceae) sampled over 3 years in a subtropical climate in Baja California Sur, Mexico. Each macroalga had a particular sterol composition that was typical of their taxonomic group. The red algae had cholesterol as the major sterol; 92% on average in G. robustum and 90% in G. sjoestedtii, followed by t‐dehydrosterol and brassicasterol. In the brown algae the major sterol was fucosterol, which accounted for approx. 90% and 92% of total sterols for M. pyrifera and E. arborea, respectively, followed by campesterol (7% and 5%) and isofucosterol (1.5% and 1.3%). The green algae had isofucosterol as the major sterol, with 92% on average for U. lactuca and 87% for U. clathrata, followed by cholesterol, fucosterol, and brassicasterol or norcholesterol. The seagrass P. torreyi had β‐sitosterol as the major sterol (39 to 89%, depending on the season), followed by campesterol (4 to 7%), stigmasterol (3 to 6%), and isofucosterol (1.7 to 3.5%). Four (cholesterol, campesterol, fucosterol, and isofucosterol) of the 14 sterols identified in macroalgae and the seagrass could be used to differentiate between classes (Florideophyceae – red, Phaeophyceae – brown, Ulvophyceae – green, and Monocots – seagrass) both seasonally and interannually. The seasonal and interannual sterol composition of macroalgae and seagrass was quite stable, with the exception of red G. sjoestedtii sampled in August and green macroalga U. lactuca and seagrass P. torreyi both sampled in May 2002. Seasonal and interannual variations of proximate and sterol composition are discussed in relation to their reproductive state and environmental parameters.

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“…It has also been reported that eutrophication can result in increased abundance of ephemeral and filamentous algae (for example, Enteromorpha) (Worm et al 2002;Worm and Lotze 2006). Hernández-Carmona et al (2011) conducted an experiment on the effect of artificial nutrient supply on understory algae during the 1997 ENSO at the Mexican Pacific coast of Baja California and concluded that eight species of algae and one seagrass, among 26 species, had a positive response to the nutrients. Further study on the effect of nitrate supply on seaweed communities is needed to develop this essential means for kelp enhancement during the recent global warming situation.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of Saccharina kelp production by nutrient supply in the Sea of Japan off southwestern Hokkaido, Japan

Agatsuma

Endo

Yoshida³

et al. 2013

J Appl Phycol

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Apart from certain studies on Macrocystis pyrifera (Linnaeus) C. Agardh, very few in situ experimental studies on production have been carried out to verify that "bottom-up effects" (relating to nutrient supply) are more important than "top-down" effects (relating to herbivory) in temperate kelp forests. The effects of nutrient supply on recruitment and production of hatchery-raised gametophytes of Saccharina japonica, cultivated on a rope, and wild Saccharina religiosa, cultivated on a rope and on new concrete reefs placed at the sea bottom, were examined at an experimental site with artificial nutrient addition continuously from without nutrient supply, at a natural site in Tomari (Sea of Japan, southwestern Hokkaido, Japan). At both sites, sea urchins were removed for exclusion of top-down effect. At the natural site, no hatchery-raised S. japonica and wild S. religiosa grew on the rope. No wild S. religiosa grew on the porous-concrete reefs and rocks. At the nutrient-enhanced site, S. japonica and S. religiosa grew rapidly on the rope, at rates of 47.7 and 33.3 plants/10 cm length rope, respectively. S. religiosa grew on the concrete reefs at a concentration of 9.7 plants/0.3 m 2 . At the nutrientenhanced site, the concentrations of NH 4 -N, NO 3 -N, NO 2 -N, and PO 4 -P ranged from 35.2-173.2, 2.1-10.9, 0.3-1.5, and 0.8-2.6 μmol L −1 , respectively, being markedly higher than those at the natural site, where these nutrient concentrations were almost equal to the averages off Tomari. These results indicate that the production of Saccharina kelp is restricted by bottom-up effects (at a low nutrient concentration) in the Sea of Japan, southwestern Hokkaido. Nutrient supply would be essential for growth enhancement of Saccharina kelp production in a marine environment around Japan where, in recent times, water temperatures have increased by ca. 0.5°C and nutrient concentrations have decreased.

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Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California

Cited by 12 publications

References 33 publications

The ‘golden kelp’ Laminaria ochroleuca under global change: Integrating multiple eco‐physiological responses with species distribution models

The ‘golden kelp’ Laminaria ochroleuca under global change: Integrating multiple eco‐physiological responses with species distribution models

Seasonal and interannual variation of sterols in macrophytes from the Pacific coast of Baja California Peninsula (Mexico)

Enhancement of Saccharina kelp production by nutrient supply in the Sea of Japan off southwestern Hokkaido, Japan

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