Showing papers by "Ferdinando Boero published in 2001"

Spatial variability and human disturbance in shallow subtidal hard substrate assemblages: a regional approach

Abstract: Quantitative information about spatial patterns in subtidal hard substrate assemblages is scant. Such information is necessary to understand the responses to anthropogenic disturbances in these habitats. Along the coast of Apulia (Southern Italy), the collection of the European date mussel Lithophaga lithophag ais a strong source of disturbance: harvesting is carried out by demolition of the rocky substrate and causes epibiota disappearance. A hierarchical sampling design was used to quantify the spatial variability of subtidal epibenthic assemblages and the extent of rock damage due to L. lithophaga harvesting along 360 km of rocky coasts in Apulia. The surveyed coast was divided into 8 adjacent sectors, and replicate samples were taken by visual inspection at each of the 3 sites nested in each sector. Multivariate analyses indicated that assemblages differed consistently with spatial scale, variability being higher at the largest scale. However, variability among sites within each sector was also detected. Patchiness (i.e., average similarity among quadrats) was consistent among sectors. Some species were identified as 'important' in characterising and/or differentiating sectors. The pattern of distribution of these species as well as total cover and number of species were analysed by analysis of variance. Results recorded a considerable source of variation at site level. Damage by L. lithophaga fishing was shown to be extremely widespread. A humped relationship between patchiness and disturbances by L. lithophag afisheries was obtained. In particular, patchi- ness at a small scale was highest at 'intermediate' levels of damage, because disturbance produces patches of different size and/or age, leading to 'mosaic' landscapes of epibenthic assemblages.

Environmental impact of antifouling technologies: state of the art and perspectives

Abstract: 1. Marine fouling affects most man-made surfaces temporarily or permanently immersed in the sea, resulting in significant (or substantial) economic costs. Intense research is aimed at preventing or reducing fouling. 2. The most widespread solution to avoid fouling formation is to make surfaces unsuitable for settlers, coating them with antifouling (AF) paints containing toxic compounds. Most AF agents (e.g. tributyltin, (TBT)) have undesirable effects on non-target species, including commercially important organisms. 3. To date, the use of TBT in AF paints has been restricted (but not prohibited) in a number of countries and new biocides are in use. 4. The environmental problems posed to marine systems by AF technologies are here briefly reviewed. 5. New approaches focusing on alternatives to the use of biocidal AF paints are also considered and discussed. Copyright © 2001 John Wiley & Sons, Ltd.

Light after dark: the partnership for enhancing expertise in taxonomy.

Abstract: The recognition of the value of biological diversity, especially after the famous Rio convention, has caused a flurry of national and international plans aimed at the exploration of biodiversity. Biodiversity is a magic word that opens many doors in funding agencies 1xAn international biodiversity observation year. Wall, D et al. Trends Ecol. Evol. 2001; 16: 52–54Abstract | Full Text | Full Text PDF | PubMed | Scopus (8)See all References1. The three definitions of biodiversity (subspecific, specific and supraspecific) involve genetic, organism, population and ecological approaches, even though the concern about biodiversity stems from the still unanswered question ‘How many species are there on earth?’ 2xHow many species are there on Earth?. May, R.M. Science. 1988; 241: 1441–1449Crossref | PubMedSee all References2.Genetics at a molecular level and ecology at a functional level were well represented in the scientific arena even before the biodiversity frenzy, whereas the science of species description, naming and classification (taxonomy and systematics) is passing through a world crisis that is far from being solved. There are two reasons for this crisis. One is the non-existent Impact Factor (IF) of most of the journals that publish species descriptions and taxonomic revisions. The IF is a widely used parameter to score the performance of researchers, leading to career opportunities and advancements. If you have a low IF, your future is dark. The other reason is that species description is seen as an old-fashioned way of doing research. The result is that experts in taxonomy retire and are not replaced, zoology and botany disappear from university curricula and new researchers in biodiversity end up being either molecular biologists or ecologists.Too extreme a statement? Consider this: a recent paper on animal evolution in Trends in Genetics 3xAnimal evolution, the end of intermediate taxa?. Adoutte, A et al. Trends Genet. 1999; 15: 104–108Abstract | Full Text | Full Text PDF | PubMed | Scopus (137)See all References3 included a glossary explaining the following terms: Bilaterians, Cambrian explosion, Clade or Natural group, Diploblasts, Evolutionary radiation, Metazoans, Monophyletic taxon, Phylum, Superphylum, Synapomorphy, Taxon, Triploblasts. This means that the editor of this journal supposes that a general reader interested in animal evolution is not familiar with these concepts. Look at a species list in a standard ecological paper and check how accurate are the data sets that, often, are then analyzed with the most sophisticated statistical packages.This is the dark. And here is the light. The dismissal of taxonomy worldwide originated from the USA. This mistake has now been recognized and a strategy has been implemented in the USA to correct it. The National Science Foundation of the USA has realized that taxonomy is dying and that the USA cannot have a scientific community that is deprived of taxonomists. This led to the launch of the Partnership for Enhancing Expertise in Taxonomy (PEET) (http://web.nhm.ukans.edu/∼peet/). Although other countries have begun to neglect their taxonomic expertise, they still have taxonomists and the situation is not as dire as that in the USA. Italy, for example, is the only country to have published a complete checklist of its fauna simply because it still has a breed of taxonomists 4xSystematics and biodiversity. Minelli, A. Trends Ecol. Evol. 1994; 9: 227Abstract | Full Text PDF | PubMed | Scopus (4)See all References4. Italian taxonomists are, however, getting older and are not being replaced, meaning that Italy is suffering today from the same mistake that affected the USA scientific community some 20 years ago. These non-USA countries harbor the experts in traditional taxonomy (those in the USA are very advanced in molecular aspects) and often provide the actual founders of the new breed of USA taxonomists. The PEET project on the Hydrozoa, for instance, is based on work by an Italian and a Brazilian student.A PEET taxonomist is a blend of a traditional morphological specialist and a molecular systematist. These two approaches to biodiversity rarely interact, producing paradox that traditional taxonomists have many problems that their techniques cannot solve, whereas molecular taxonomists have powerful techniques but not so many problems to solve, once the most obvious ones have been done. A standard product of a PEET project is a thorough revision of a taxon, which includes studying all the existing literature, inspecting type specimens, collecting new material, molecular analysis of specimens referred to as many nominal taxa as possible, disentangling of synonymies and production of a phylogeny based on both morphological and molecular approaches.Despite having no impact, taxonomic publications have eternal life and one cannot ignore old descriptions simply because they are old. A complete library is thus a prerequisite for good taxonomic work. Many PEET projects require that bibliographic data bases are made available through the Internet for free, also with the option of downloading articles in PDF format when possible. In this way, taxonomy will be enhanced not only in the USA but also in the rest of the world. As an example, refer to the bibliographic database on the Hydrozoa (http://siba2.unile.it/ctle/hydro/index.php3).The prominence of Europe as a land of taxonomists will not last long unless more PEET-like projects are launched soon, each with a carefully planned strategy of specialist training and proper career opportunities. If this does not happen, in 20 years, Europeans will send their youngsters to learn taxonomy in the USA.The problem of the decline of taxonomy, finally, is also due to taxonomists. Specialists in astrophysics are able to convince funding agencies to invest enormous amounts of money to look for extraterrestrial life. The same people who invest public money in these irrelevant enterprises 5xThe probability of extraterrestrial intelligent life. Mayr, E. : 67–74See all References5 are obviously not convinced by taxonomists that it is worthwhile investing money to explore the life of this planet!

Occurrence of the Mediterranean parrotfish Sparisoma cretense (Perciformes: Scaridae) in south-eastern Apulia (south-east Italy)

Abstract: The Mediterranean parrotfish Sparisoma cretense is reported for the first time along the south-eastern coasts of Apulia (Ionian Sea, south-east Italy). Only juvenile specimens of S. cretense were observed during visual census surveys carried out in late August 2000, whereas adults were never observed in, or reported from, this region. Juvenile parrotfish were 3-4-cm long (TL), with a light-grey livery, pale-yellow heads and marked yellow margins around the eyes. They were recorded at 5 15 m depth, whereas they were absent near the surface (0-2m depth) and in deeper areas (25-28 m depth). The possibility that climatic changes occurring in the Mediterranean basin (i.e. water warming) would be involved in the spreading of S. cretense outside its typical distribution range is discussed.