Erasmo C Macaya

University of Concepción · Departamento de Oceanografía

The paradigm of past climate‐driven range shifts structuring the distribution of marine intraspecific biodiversity lacks replication in biological models exposed to comparable limiting conditions in independent regions. This may lead to confounding effects unlinked to climate drivers. We aim to fill in this gap by asking whether the global distribu...

Codium fragile is considered one of the most invasive marine seaweeds. It has invaded coastal habitats worldwide in temperate regions (30°–60° in both hemispheres), but it is rarely found at lower latitudes (i.e., tropical and subtropical regions). Here we document the distribution of C. fragile together with relevant size and reproductive paramete...

esta guía fotográfica es una puerta de entrada al fabuloso mundo de las macroalgas que pueden encontrarse en las costas de Ushuaia. Se compone de fotografías a todo color de 42 especies de macroalgas verdes, pardas y rojas, obtenidas en salidas de campo y en trabajos de laboratorio. La guía , desarrollada en el marco del curso teórico práctico "Guí...

Algas Marinas Antárticas, Isla Rey Jorge (2022) Antarctic Seaweeds - King George Island

In contrast to other coastal regions of the world, the giant kelp (Macrocystis pyrifera) ecosystem in southwestern Patagonia has been persistent in area and associated biodiversity in the last decades. In this ecoregion, sea surface temperature (SST) records have consistently remained below the upper thermal threshold for kelp survival, however, no...

Globally, species distributions are shifting in response to environmental change,1 and those that cannot disperse risk extinction.2 Many taxa, including marine species, are showing poleward range shifts as the climate warms.3 In the Southern Hemisphere, however, circumpolar oceanic fronts can present barriers to dispersal.4 Although passive, southw...

Algas Marinas del Chile Central Seaweeds from Central Chile

Community assembly is the result of both, deterministic and stochastic processes. The former encompasses niche-based local-scale mechanisms such as environmental filtering and biotic interactions; the latter includes ecological drift, probabilistic colonisation, and random extinctions. Using standardised sampling protocols, we show that the spatial...

Este libro está escrito como una guía de reconocimiento accesible al público, permitiéndole aprender sobre la diversidad biológica existente en la flora y considerando principalmente su fragilidad dentro del ecosistema marino subantártico. This book is written as an appreciation guide accessible to the public, allowing it to learn about the biolog...

Posters de Macroalgas Subantárticas - Región de Magallanes y Antártica Chilena Subantarctic Macroalgae Posters

Aim Marine habitats and their dynamics are difficult to systematically monitor, particularly those in remote locations. This is the case with the sub-Antarctic ecosystem of the giant kelp Macrocystis pyrifera, which was already noted by Charles Darwin in his accounts on the Voyage of the Beagle and recorded on the nautical charts made during that e...

Acquiring marine biodiversity data is difficult, costly, and time-consuming, making it challenging to understand the distribution and abundance of life in the ocean. Historically, approaches to biodiversity sampling over large geographic scales have advocated for equivalent effort across multiple sites to minimize comparative bias. When effort cann...

Esta investigación es un aporte al conocimiento de algunas especies de macroalgas marinas que fueron recolectadas durante las expediciones científicas "Almirante Padilla" (2016-2017) y "Almirante Campos" (2018-2019), en las que participó el Instituto de Investigaciones Marinas y Costeras-Invemar con el proyecto: Biodiversidad y Condiciones Oceanogr...

2020. The biogeographical importance of buoyancy in macroalgae: A case study of the southern bull-kelp genus Durvillaea (Phaeophyceae), including descriptions of two new species. J. Phycol. 56:23-36.

Guía fotográfica que incluye 90 especies comunes de las costas de Chile continental e Islas Oceánicas.

La guía está compuesta por fotografías a todo color de 42 especies de macroalgas. Corresponden a 9 algas verdes, 12 algas pardas y 21 algas rojas presentes en las costas de Ushuaia. La mayoría de las imágenes se obtuvieron en salidas de campo y trabajo de laboratorio desarrollados en el marco del Curso Teórico-Práctico: Diversidad de Macroalgas de...

Aim: We evaluated whether patterns of species diversity (α, β and γ) of rocky shore assemblages followed latitudinal gradients (i.e. LDGs) along the South American coasts, and tested hypotheses related to potential processes sustaining or disrupting the expected LDG pattern at various spatial scales. Location: Coasts of South America. Taxon: Macroa...

After detachment from their substratum, many seaweeds can float or drift at the mercy of currents and winds, thereby facilitating their dispersal and connectivity. In Antarctica only one species possess floating structures (gas-filled vesicles), the brown seaweed Cystosphaera jacquinotti. However, other species such as Durvillaea antarctica and Mac...

Biodiversidad Marina del Litoral Rocoso de "Caleta Chome"

Giant kelp (Macrocystis pyrifera) is the most widely distributed kelp species on the planet, constituting one of the richest and most productive ecosystems on Earth, but detailed information on its distribution is entirely missing in some marine ecoregions, especially in the high latitudes of the Southern Hemisphere. Here, we present an algorithm b...

The genus Durvillaea includes six currently accepted species, as well as two newly proposed species. Durvillaea spp. have a diplontic life cycle, lack a free-living gametophyte and have oogamous reproduction. All Durvillaea species require rocky substrate for attachment and wave-exposed environments. These “southern bull kelps” occur exclusively in...

Knowledge on the status and trends in marine biodiversity, and associated drivers of biodiversity change across the Americas is sparse and geographically uneven. International cooperation is needed to fill observational gaps at these geographic scales and provide information to satisfy policy targets of the 2030 Agenda for Sustainable Development a...

Cryptic diversity is common in the red algae and is often discovered when comparing specimens from distant locations or different morphotypes of species with high phenotypic plasticity. The genus Lophurella includes seven species from the cold-temperate coasts of the southern hemisphere. L. periclados is the only species reported from Australia whe...

Consumer pressure in benthic communities is predicted to be higher at low than at high latitudes, but support for this pattern has been ambiguous, especially for herbivory. To understand large-scale variation in biotic interactions, we quantify consumption (predation and herbivory) along 2500 km of the Chilean coast (19°S–42°S). We deployed tetheri...

Long distance dispersal plays a key role in evolution, facilitating allopatric divergence, range expansions, and species movement in response to environmental change. Even species that seem poorly suited to dispersal can sometimes travel long distances, for example via hitchhiking with other, more intrinsically dispersive species. In marine macroal...

Surveys of the seaweed flora of the Falkland Islands and of Tierra del Fuego revealed the presence of a new species of brown alga. Dictyota falklandica sp. nov. inhabits the shallow rocky infralittoral in sheltered localities and the lower intertidal in more exposed sites. Dictyota falklandica has a regular to irregular habit of dichotomously branc...

Supplementary material for publication "The phylogeographic history of Callophyllis variegata (Florideophyceae, Rhodophyta) in the Pacific Ocean," including specimen list and IMa2 model comparisons.

Chilean species of marine macroalgae with amphitropical distributions oftentimes result from introductions out of the Northern Hemisphere. This possibility was investigated using haplotype data in an amphitropical red macroalgae present in Chile, Callophyllis variegata. Published sequence records from Canada and the United States were supple- mente...

Availability of floating seaweeds may depend on the seasonal cycles of benthic populations, but our ability to predict temporal patterns of stranded biomasses is still limited. Season-dependent, local storms favor detachment of seaweeds from the substratum, which can be reflected in the stranded biomasses on adjacent beaches after these events. Hen...

In order to contribute to the dissemination of marine sciences, we have reedited the text "Un mar de cosas por explorar" published more than a decade ago by the same team of editors, under the name "Exploring the marine ecosystem of northern Chile: Marine ecology guide for the school world" is an update of the text. This new text is much more than...

Macrocystis pyrifera is ecologically and commercially important seaweed; therefore, it is a well-studied species in terms of its morphology, geographical distribution and its economic uses in Perú. However, research on its genetic structure is scarce. A recent study conducted along the Southeastern coast of the Pacific, concluded that Macrocystis h...

Cryptic diversity has been often detected in the red algae when molecular assisted taxonomy has been applied. It is common in species with alleged wide distributions or high phenotypic plasticity. The red algal genus Lophurella includes seven species from the cold and temperate southern hemisphere. L. caespitosa is endemic to New Zealand. L. pericl...

Macrocystis pyrifera is ecologically and commercially important seaweed; therefore, it is a well-studied species in terms of its morphology, geographical distribution and its economic uses in Perú. However, research on its genetic structure is scarce. A recent study conducted along the Southeastern coast of the Pacific, concluded that Macrocystis h...

Algas Marinas del Archipiélago J. Fernández - Seaweeds from J. Fernandez Archipelago

Despite studies suggesting that most seaweeds are poor dispersers, many red algal species are reported to have circumglobal distributions. Such distributions have mostly been based on morphological identifications, but molecular data have revealed a range of issues with morphologically defined species boundaries. Consequently, the real distribution...

Antarctica has long been considered biologically isolated¹. Global warming will make parts of Antarctica more habitable for invasive taxa, yet presumed barriers to dispersal—especially the Southern Ocean’s strong, circumpolar winds, ocean currents and fronts—have been thought to protect the region from non-anthropogenic colonizations from the north...

Aim: This study examines how rafting on floating bull kelps can shape the biogeographic patterns of raft-associated species, and analyses the spatio-temporal variability of taxonomic richness and co-occurrences of epibionts on beach-cast rafts of Durvillaea antarctica along a latitudinal gradient. Location: Southeast Pacific, along ~1,700 km of coa...

In this paper we propose a checklist of 14 species of exotic seaweeds on the Chilean coast, and three species which, being native to the Chilean coast, have been introduced in areas outside their natural range. This list was compiled from previously published checklist, debugged the misidentified records, and incorporating new ones. The distributio...

The processes underpinning the differences between Antarctic and sub-Antarctic ecological communities are still unclear. Dispersal, drift, speciation, and abiotic environmental filtering have been considered to explain these differences; biotic interactions, however, have received less attention. Antarctic intertidal assemblages of macrobenthic gra...

A new and putatively endemic species of Hydroclathrus, Hydroclathrus rapanuii, is described from the geographically isolated Easter Island in the southeastern Pacific based on morphological and molecular phylogenetic data. It is distinguished from other Hydroclathrus by thalli of unevenly furrowed thin membranes, and angular, block-like plurangial...

In the Eastern Pacific (EP) the only region where rhodolith beds have been well studied in terms of taxonomy, ecology, distribution and conservation status is the Gulf of California. Outside this region the knowledge of rhodolith-forming species is attributed to the initial separate floristic surveys of Dawson and Lemoine, performed more than 50 ye...

Rafting on floating seaweeds facilitates dispersal of associated organisms, but there is little information on how rafting affects the genetic structure of epiphytic seaweeds. Previous studies indicate a high presence of seaweeds from the genus Gelidium attached to floating bull kelp Durvillaea antarctica (Chamisso) Hariot. Herein, we analyzed the...

El Sistema de Canales y Fiordos Patagónicos ha sido sometido a una serie de procesos glaciológicos durante el cuaternario que han modelado su geomorfología. En el extremo sur de la región de Magallanes el canal Beagle, es un sistema influenciado por una serie de masas de hielo, destacando glaciar Stoppani en el fiordo Yendegaia. Con las variaciones...

La costa chilena presenta menos reportes de especies introducidas respecto a otras costas a nivel mundial, lo que podría corresponder a un fenómeno natural generado por condiciones oceanográficas, o bien a un artefacto producido por falta de información disponible. Mediante el análisis de 71 trabajos indexados en Web of Science, relacionados con ec...

Dispersal on floating seaweeds depends on availability, viability and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local su...

The Chilean coast has fewer reports of introduced species for other shores worldwide, which could correspond to a natural phenomenon generated by oceanographic conditions, or an artifact caused by lack of available information. We analyzed 71 papers indexed in Web of Science related with ecology of marine invasions in the Chilean coast, published b...

Members of the brown algal genus Hydroclathrus, easily identified by their characteristic net-like appearance, are economically important species that are used as food, fertilizer, and animal fodder. Hydroclathrus species also produce high value natural products such as alginates and fucoidan, and are collectively considered as potential sources of...

Floating seaweeds are important dispersal vehicles for many organisms in cold-temperate waters between lati- tudes 30° and 60°. Molecular studies suggested that long-distance rafting of seaweeds is more prevalent at the polar edges of their distribution but knowledge about their physiological status at high latitudes is limited. Sea- sonal short-te...

Background Obtaining strongly supported phylogenies that permit confident taxonomic and evolutionary interpretations has been a challenge in algal biology. High-throughput sequencing has improved the capacity to generate data and yields more informative datasets. We sequenced and analysed the chloroplast genomes of 22 species of the order Nemaliale...

There has been progress in novel additions of algal data to the Plant DNA C-values database during recent years; however more information is still required. Specifically, in the case of red algae (Rhodophyta), from ~6000 species described up to date, DNA C-values for only 196 species have been incorporated (~3%). This research represents the first...

Many seaweed species (primary rafters) float at the sea surface and travel with marine currents after detachment from benthic habitats. Various studies have confirmed that dispersal via floating sporophytes and/or gametophytes influences the phylogeography and genetic population structure of these buoyant seaweeds. In addition, non-buoyant seaweeds (se...

The coast along the temperate South East Pacific (SEP) presents a simple linear topography with a north-south orientation spanning more than 4600 km. However, environmental heterogeneity associated with two major biogeographic boundaries has been described along the SEP (30–33°S and 42°S). Recent phylogeographic studies of seaweeds revealed the exi...

Marine Benthos: Biology, Ecosystem Functions and Environmental Impact is a book dedicated to show a series of case studies about how benthic habitats are organized and how they function as a tool for any environmental impact studies. The present book documents how the natural condition of these communities is and aims to expand our present knowledg...

Rocky shores are areas of high diversity and productivity providing goods and services. Since humans are altering nature at an unprecedented rate, producing shifts in important parameters for life such as temperature, habitat availability, water quality, among others, it is expected that species will respond by changing their natural distributions...

In a three-hour bioassay, we tested the palatability and feeding preferences of Uresiphita maorialis (kōwhai moth) for Sophora tetraptera, Sophora microphylla and Sophora prostrata. Palatability tests showed no differences among the Sophora species. Feeding preferences, on the other hand, showed that S. tetraptera and S. microphylla leaves are pref...