Left to right: Gustavo Rubio and Melissa Romigh measuring diameter at breast height (DBH) of mangrove trees at SRS-6, Shark River Slough

This material is based upon work supported by the National Science Foundation through the Florida Coastal Everglades Long-Term Ecological Research program under Cooperative Agreements #DBI-0620409 and #DEB-9910514. This image is made available for non-commercial or educational use only.

Measuring sawgrass in macrophyte plots at TS/Ph-1 (Gustavo Rubio, Damon Rondeau)

This material is based upon work supported by the National Science Foundation through the Florida Coastal Everglades Long-Term Ecological Research program under Cooperative Agreements #DBI-0620409 and #DEB-9910514. This image is made available for non-commercial or educational use only.

Responses of sawgrass and spikerush to variation in hydrologic drivers and salinity in Southern Everglades marshes

Aboveground net primary production (ANPP) by the dominant macrophyte and plant community composition are related to the changing hydrologic environment and to salinity in the southern Everglades, FL, USA. We present a new non-destructive ANPP technique that is applicable to any continuously growing herbaceous system. Data from 16 sites, collected from 1998 to 2004, were used to investigate how hydrology and salinity controlled sawgrass (Cladium jamaicense Crantz.) ANPP. Sawgrass live biomass showed little seasonal variation and annual means ranged from 89 to 639 gdw m)2. Mortality rates were 20–35% of live biomass per 2 month sampling interval, for biomass turnover rates of 1.3–2.5 per year. Production by C. jamaicense was manifest primarily as biomass turnover, not as biomass accumulation. Rates typically ranged from 300 to 750 gdw m)2 year)1, but exceeded 1000 gdw m)2 year)1 at one site and were as high as 750 gdw m)2 year)1 at estuarine ecotone sites. Production was negatively related to mean annual water depth, hydroperiod, and to a variable combining the two (depth-days). As water depths and hydroperiods increased in our southern Everglades study area, sawgrass ANPP declined. Because a primary restoration goal is to increase water depths and hydroperiods for some regions of the Everglades, we investigated how the plant community responded to this decline in sawgrass ANPP. Spikerush (Eleocharis sp.) was the next most prominent component of this community at our sites, and 39% of the variability in sawgrass ANPP was explained by a negative relationship with mean annual water depth, hydroperiod, and Eleocharis sp. density the following year. Sawgrass ANPP at estuarine ecotone sites responded negatively to salinity, and rates of production were slow to recover after high salinity years. Our results suggest that ecologists, managers, and the public should not necessarily interpret a decline in sawgrass that may result from hydrologic restoration as a negative phenomenon.

Controls on herbaceous litter decomposition in the estuarine ecotones of the Florida Everglades

The effects of nutrient availability and litter quality on litter decomposition were measured in two oligotrophic phosphorus (P)-limited Florida Everglades esturies, United States. The two estuaries differ, in that one (Shark River estuary) is directly connected to the Gulf of Mexico and receives marine P, while the other (Taylor Slough estuary) does not receive marine P because Florida Bay separates it from the Gulf of Mexico. Decomposition of three macrophytes.Cladium jamaicense, Eleochaaris spp., andJuncus roemerianus, was studied using a litter bag technique over 18 mo. Litter was exposed to three treatments: soil surface+macroinvertebrates (=macro), soil surface without macroinvertebrates (=wet), and above the soil and water (=aerial). The third treatment replicated the decomposition of standing dead leaves. Decomposition rates showed that litter exposed to the wet and macro treatments decomposed significantly faster than the aerial treatment, where atmospheric deposition was the only source of nutrients. Macroinvertebrates had no influence on litter decompostion rates.C. jamaicense decomposed faster at sites, with higher P, andEleocharis spp. decomposed significantly faster at sites with higher nitrogen (N). Initial tissue C:N and C:P molar ratios revealed that the nutrient quality of litter of bothEleocharis spp. andJ. roemerianus was higher thanC. jamaicense, but onlyEleocharis spp. decomposed faster thanC. jamaicense. C. jamaicense litter tended to immobilize P, whileEleocharis spp. litter showed net remineralization of N and P. A comparison with other estuarine and wetland systems revealed the dependence of litter decomposition on nutrient availability and litter quality. The results from this experiment suggest that Everglades restoration may have an important effect on key ecosystem processes in the estuarine ecotone of this landscape.

Collecting and Curating Cuban: Memory, Museum, and Material Cultures, Lecture by Raúl Rubio and Christian Larsen

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Écfrasis y Lecturas Icono-textuales en las "Leyendas" de Gustavo Adolfo Bécquer

The relationship between literature and the visual arts is ancient and it has been studied from different conceptual frames. Scholars agree that both have a descriptive function and therefore share the common goal of portraying a fictional or nonfictional reality. Based on this correspondence between two different modes of artistic expression, the Roman poet Horace coined the well-known simile ut pictura poesis --as is painting so is in poetry-- which in turn functions as the theoretical underpinning of ekphrasis, a rhetorical device through which one medium of art tries to describe the essence and form of another medium of art, with the purpose of enhancing the original work described. Spanish post-romantic poet and writer Gustavo Adolfo Bécquer (1836-1870) mastered this rhetorical strategy by expertly weaving all of his artistic interests into his prose. The purpose of this dissertation is to analyze how Bécquer makes his readers both see and hear through his prose. My semiotic research encompasses the various forms of ekphrasis used by Bécquer in the “Leyendas”. It shows how both images and symbols produce in readers sensory experiences that enhance their role as active participants in the creation of meaning. Thus, Bécquer´s prose is like a painting which not only tells a story, but also reflects reality through the eyes of the reader’s imagination. By using these ekphrastic strategies in his collection of short stories, Bécquer makes words, paintings, and music converge and collide with iconography, visual culture, and intertextuality. These components must be read, seen, heard, and understood to be more than just complementary to the text, but rather crucial elements, equal in importance to verbal expression. This analysis shows how Bécquer’s “Leyendas” not only tackle notions such as fantasy, figuration, and imagination, but also the importance of the reader´s gaze. Bécquer integrates processes such as imaginative action, iconization and visualization, into a semantic web whereby the reader creates his own particular hermeneutic image.