http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4347 Fri, 10 Apr 2026 19:53:14 GMT 2026-04-10T19:53:14Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9812 Título: Composição química de microalgas marinhas cultivadas em laboratório Autor: MOURA JUNIOR, Alfredo Matos Primeiro orientador: BEZERRA NETO, Egídio Abstract: The chemical composition of the microalgae Chaetoceros gracilis, Cylindrotheca closterium, Isochrysis galbana, Tetraselmis gracilis and Thalassiosira weissflogii was determinated aiming to provido data in order to orientate aquafarmers, since the nutricional value of these microalgae, used as food for the cultivated animais, is still little known in the Northeast of Brazil. At the Federal University of Pernambuco, C. gracilis, C. closterium and T. gracilis were grown at constant temperatura of 20°C until reach the volume of 8 L, in carboys. The volume was increased and aerated from 1 L every eight days. At the Aqualider Company, C. gracilis, I. galbana and T. weissflogii were cultured at constant temperatura of 18°C imtil reach the volume of 20 L in plastic bags, with the aeration starting from 0,5 L, and the volume increased every two days. Both experiments were carried out under continuous illumination, in F2 - Guillard médium. For the cultura in plastic bags, the analyses were realized the beginning of the exponential phase and, for the culturas in carboys, at the end of the exponential phase. Regarding the culturas in plastic bags, I. galbana presented the highest cellular density (3.295 x 10® cell.L-¹), with significant difference superior to the other species, and the highest soluble carbohydrates levei (0,09 mg.L-¹), followed by C. gracilis (0,06mg.L-¹) and T. weissflogii (0,05 mg.L-¹), also presenting significant differences among the three species, and the highest values of nitrate, phosphorum and magnesium, with signiíicant differences superior, to the other species. T. weissflogii presented the highest values of sodium, potassium and sulfur. In relation to the chlorophyll a, C. gracilis presented the highest levei (3,74 mg.L-¹), followed by I. galbana (1,87 mg.L-¹) and T. weissflogii (0,96 mg.L-¹), with signiíicant differences among the three species. Conceming the cultures in carboys, C. gracilis presented the highest values for cellular density (8.447 x 10® cell.L-¹), soluble carbohydrate (0,10± 0,009 mg.L-¹) and magnesium (14,78 mg.L-¹). C. closterium presented the highest concentration of chlorophyll a (13,76 mg.L-¹), soluble protein (0,62 mg.L-¹), total free amino acids (23,82 mg.L-¹), nitrate (0,365 mg.L-¹), sodium (0,46 mg.L-¹) and phosphorus (2,80 mg.L-¹). The potassium (0,02 mg.L-¹) and sulfur (0,03 mg.L-¹) contents were the same for C. gracilis and C. closterium. The species T. gracilis presented the lowest values conceming the analyzed parameters. Due to the variation of the chemical composition among the species analyzed in both experiments, we suggest the use of multispecific diets for the animal feeding, thus promoting its hest development in a shorter period of time. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Tese Fri, 21 Jun 2002 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9812 2002-06-21T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9793 Título: Descritores morfológicos de frutos de dicotiledôneas para banco de dados Autor: GAMARRA ROJAS, Guillermo Primeiro orientador: SAMPAIO, Everardo Valadares de SÁ Barretto Abstract: This study aimed to develop a system of formal descriptors and standard terminology which would permit the description of fruit macro-morphology for inclusion in multiple-use databases based upon information taken from the literature and the observation of iive fruits. Creation of formal descriptors required that the object (the fruit) be broken down into its basic components (structures). This logical approach enabled clarification of the types of morphological data used in the literature and provided a basis for establishing usefiil descriptors. It would appear to have potential for application in similar studies. An analysis of a broad bibliographical review showed that plant features used to describe fruits and to distinguish both fruit 'lypes" and the morphological syndromes associated with fruit dispersion ali belong to a group of basic features (structural, qualitative and quantitative), commonly used in the description of biological organs and organisms. The structural features describing fruit type which are used extensively in the literature dealing with taxonomy, morphology and fruit dispersion were found insufficient to describe species adequately. It was necessary to include some of the descriptive features (both quantitative and qualitative) that are used in determining dispersion syndromes and/or in the taxonomic literature, in order to be able to distinguish among species. The usage of terms referring to structure was delimited and criteria established for those creating or using sets of formal descriptors. 619 descriptors are proposed, divided into 6 categories: descriptors of fruit origin (4); descriptors of fruits arising from inflorescences (87); descriptors of finits arising from apocarpous gynoecia (99); descriptors of fruits arising from syncarpous gynoecia (191); descriptors of fruits arising from moncarpous gynoecia or free carples or mericarps (178) and descriptors of seeds (60). The descriptors included are appropriate for the creation of databases but can also be used directly for the objective description of fruits. The use of structured descriptors with a simple language and terminology can contribute to improving communication of fruit descriptions. Given that the users of the descriptors are diverse, including users and administrators of the database and curators of herbaria and germ plasm banks, taxonomists. ecologists and educationalists, modifications or additions to this set can be made using the model and approach presented. The descriptors here presented contribute to the literature by improving the understanding and description of fruits and of the dispersion syndromes of neotropical Dicotyledons given that most of the available literature is about fruits of the temperate zones. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Tese Fri, 01 Feb 2002 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9793 2002-02-01T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9759 Título: Revisão taxonômica dos gêneros Dyschoriste Nees e Hygrophila R.Br. (Ruellieae – Acanthaceae) para o Brasil Autor: MONTEIRO, Fernanda Kalina da Silva Primeiro orientador: MELO, José Iranildo Miranda de Abstract: Ruellieae (Acanthaceae) is distributed in the pantropical region, with Brazil as one of the main centers of diversity in the New World, followed by Mexico and Peru. In Flora of Brazil it is represented by 120 species and nine genera, Dyschoriste, belonging to the subtribe Petalidiinae, and Hygrophila, to the subtribe Hygrophilinae, the least studied in the country. Studies developed in the last decades based on morphological and molecular data have been fundamental to clarify its infrafamilial relationships. Thus, studies that aim to assist in the knowledge of the taxonomy and systematics of Ruellieae in Brazil are of great importance, given that there are still gaps in the characterization of the Brazilian Dyschoriste and Hygrophila. In this context, the aim of this work was to carry out a revisional study of the genera Dyschoriste and Hygrophila for Brazil, one of its main centers of diversity, from the combination of morphological and palynological data, aiming to contribute to a better understanding of the relationships between the species of each of these genera, detecting the characteristics for solving taxonomic problems of its species. In addition, to knowing and updating their geographic distribution in the country. As a result, six chapters are presented in this thesis. The first chapter deals with nomenclatural updates in Dyschoriste and Hygrophila, with two lectotypifications, three new synonyms and the proposition of a new name. The second chapter reveals two new species of Dyschoriste for the Brazilian Northeastern, with detailed descriptions of these two taxa, as well as an identification key, illustrations of diagnostic characteristics, maps of geographic distribution and information on conservation status. In chapter 3, we present two new occurrences for the Northeastern region of Brazil and two lectotypifications for the genus Dyschoriste. Chapter 4 deals with the characterization of the pollen morphology of 11 species of Dyschoriste (seven) and Hygrophila (four) in search of characteristics with taxonomic value. Based on the evaluation of several palynological characteristics, together with data on the external morphology of branches, leaves and flowers, a new combination was proposed for a species of Dyschoriste, which was included in the genus Hygrophila. Chapter 5 presents the taxonomic revision of the genus Dyschoriste, in which 13 species were recognized, eight of which are endemic to Brazil. Additionally, descriptions, comments regarding their geographic distributions are provided, including maps, conservation status, flowering and fruiting period, illustrations and photographs and an identification key. In chapter 6 we present the taxonomic revision of the genus Hygrophila, with five species being recognized, three of which are endemic to Brazil. In addition, three lectotypifications and a new synonym are proposed. Additionally, descriptions, comments regarding their geographic distributions are provided, including maps, conservation status, flowering and fruiting period, illustrations and photographs, in addition to an identification key. The results obtained in this research revealed important external and internal morphological characteristics in the separation and recognition of both Dyschoriste and Hygrophila species, in addition to providing updates on flowering, fruiting, conservation status and geographic distribution data for both genera. We hope that our results will contribute to the understanding of the systematic relationships between the groups included in Ruellieae tribe and the Acanthaceae family as a whole. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Tese Fri, 26 Aug 2022 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/9759 2022-08-26T00:00:00Z http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8804 Título: Efeitos da arquitetura das macrófitas e dos macroinvertebrados sobre a estrutura de algas epifíticas em um reservatório tropical Autor: NASCIMENTO FILHO, Silvano Lima do Primeiro orientador: MOURA, Ariadne do Nascimento Abstract: This thesis aims to understand the factors that influence the structure of periphytic algae and macroinvertebrate communities in a tropical reservoir, considering the functional characteristics and beta diversity of periphytic algae species, in addition to understanding the top-down effects exerted by fish on periphytic algae and macroinvertebrates in continental aquatic ecosystems. The study was carried out at five different points in the Jazigo reservoir, Serra Talhada, PE, Brazil. A quarterly monitoring was carried out, between the years 2017 to 2018 (n = 4), to understand the role of limnological and biotic variables (structural complexity of macrophytes) on the structure and functional characteristics of periphytic algae communities and macroinvertebrate structure. The effects of environmental filters on the beta diversity of periphytic algae, and an in situ experiment to evaluate fish on the biomass of periphytic algae, macroinvertebrates and macrophytes. The structural attributes (wealth, biomass, abundance and diversity) of periphytic algae and macroinvertebrates were driven by the morphological complexity of macrophytes. RLQ analysis showed that loosely adhered and entangled species were positively correlated with light intensity and dissolved oxygen; prostrate species correlated positively with macrophytes of medium structural complexity. Colonial species correlated positively with nitrate, ammonia, dissolved inorganic nitrogen and macrophytes with low complexity; while unicellular species, heterotricomas and filamentous ones correlated positively with conductivity, temperature and macrophytes with high structural complexity. These effects were also observed on the beta diversity of periphytic algae. Alpha and beta diversity were higher in macrophytes with greater morphological complexity. Furthermore, the presence of different species of macrophytes contributed to the increase in richness and beta diversity of periphytic algae. Substitution was the determining component of the beta diversity of periphytic algae and was greater in macrophytes of greater morphological complexity, Eichhornia crassipes and Ludwigia helminthorrhiza. This component has a strong relationship with complex habitats. Furthermore, the beta diversity of periphytic algae was driven mainly by physical (51.34%) and chemical (31.14%) variables, and by macroinvertebrates (4.21%). Redundancy analysis explained 65% of the distribution of periphytic algae with environmental filters (physical, chemical and biological) Dissolved inorganic nitrogen, macrophyte morphological complexity, temperature, macroinvertebrate abundance, light intensity and dissolved oxygen were important to explain beta diversity of periphytic algae. Therefore, physical and chemical factors act as environmental filters on periphytic algae. The top-down effect exerted by fish on macroinvertebrates showed the efficiency of the manipulation of omnivorous fish in controlling the biomass of macroinvertebrates and indirectly the biomass of periphytic algae and macrophytes in a tropical reservoir. After 30 days, all treatments with the addition of omnivorous fish showed a reduction in macroinvertebrate biomass and an increase in periphytic algae biomass. In the treatment without the addition of fish and only in the presence of macroinvertebrates, the biomass of periphytic algae reduced and the biomass of macrophytes increased throughout the experiment. This thesis contributes to the understanding of the role of limnological and macrophyte variables with different morphological complexities on the structure of the periphytic algae and macroinvertebrate community. Environmental filters have shown to play a fundamental role on the beta diversity of periphytic algae and the importance of the presence of macrophytes for increasing habitat heterogeneity and consequent availability of niches and microhabitats for aquatic biodiversity. Finally, we observed that omnivorous fish can directly control the biomass of macroinvertebrates and indirectly the biomass of periphytic algae and macrophytes. Thus, new control strategies can be developed that can improve the efficiency of ecosystem functioning and conservation of aquatic biodiversity in tropical reservoirs. Instituição: Universidade Federal Rural de Pernambuco Tipo do documento: Tese Fri, 20 Aug 2021 00:00:00 GMT http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8804 2021-08-20T00:00:00Z