Palm Groves Research Articles

Effect of various chemical modifications of date palm fibers (DPFs) on the thermo-physical properties of polyvinyl chloride (PVC)–high-density polyethylene (HDPE) composites

Algerian palm groves, a key component of oasis ecosystems, generate significant volumes of natural waste. In the present study, leaflet and rachis derived date palm fibers (DPFs) produced from the pruning of date palm trees were used as an effective filler to reinforce composites consisting of polyvinyl chloride and high-density polyethylene (PVC-HDPE) (20:80). Composites with an untreated and treated DPFs loading of 30 wt.% were prepared using a twin-screw extruder and compression molding. The DPFs surface was modified using various treatments, including NaOH, 3-aminopropyltriethoxysilane, combined alkali-silane, bleaching with NaClO2, and H2O2+HNO3. The successful surface modification of the DPFs, including delignification and the extraction of cellulose microcrystals (CMCs), was verified using infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TG). The results revealed an improvement in the morphological, thermal, mechanical, dynamical-mechanical, rheological, and water uptake performance of the composites with the addition of the modified DPFs. It was concluded that it was the CMCs that primarily enhanced the thermo-physical properties of the PVC-HDPE composites, making them suitable for several industrial applications.

Rapid and nondestructive estimations of chlorophyll concentration in date palm (Phoenix dactylifera L.) leaflets using SPAD-502+ and CCM-200 portable chlorophyll meters

Date palm (Phoenix dactylifera L.) is the oldest known tree grown in the world’s arid regions. It has been cultivated for centuries because of its enormous cultural, agricultural, and environmental benefits. Recently date palm groves have been declined drastically due to anthropogenic, abiotic and, biotic stresses. Attaining sustainable farming and optimum crop production requires frequent monitoring of the physiological status of date palms. This demands rapid and non-destructive estimation of chlorophyll concentration in date palm leaflets overtime. In this study, four date palm cultivars, exhibiting distinct concentrations of chlorophyll, were used to assess the potential of using SPAD-502+ and CCM-200 portable chlorophyll meters to estimate the concentration of chlorophyll in date palm leaflets. Regression analyses were performed to model the relationship between the absolute concentration of chlorophyll measured in vitro and the optic indices of the two portable chlorophyll meters (SPAD and CCI). The results revealed that polynomial and power prediction models, which demonstrated remarkably close fits to each another, are the best functions to parameterize the relationships. The calibration models developed in this study were very strong and recorded high coefficient of determinations along with low relative errors for both the cultivar-specific fits (R2 ≥ 0.89; Error % ≤ 18.3) as well as the generic species-specific fits (R2 ≥ 0.822; Error % ≤ 25.0). The results confirmed that both SPAD-502+ and CCM-200 are equally effective tools for rapid and nondestructive estimation of chlorophyll concentration in date palm leaflets.

A comparative assessment on ant communities in three vegetation types located at Mfou Suburban locality of Yaoundé (Cameroon)

Urban expansion in Cameroon and many other Congo basin countries, involves the destruction of natural habitat previously colonized by a rich and diversified invertebrate and vertebrate fauna. In order to understand the dynamic of transformation of natural landscape into urban area on ant communities, a study was conducted at Mfou, a suburban agglomeration of Yaoundé. We aimed to evaluate the variation in ant diversity and ant community structure in relation to the type of habitat. Ants were collected on the ground and trees in cocoa farms, secondary forests, and palm groves using visual catch, pitfall traps, quadrat, and baits. We recorded 144 species belonging to 39 genera and 6 subfamilies. Cocoa farms (S= 102; H’= 3.83; E=0.83) were richer and more diversified than secondary forests (S= 100; H’= 3.83; E=0.83) and palm groves (S= 70; H’= 3.61; E=0.85). Myrmicinae, Formicinae and Ponerinae were the richest subfamilies both at genus and species levels. Based on their frequency of occurrence, Myrmicaria opaciventris (18.6%), Crematogaster striatula (17.1%), Crematogaster gabonensis (14.9%) and Camponotus crawleyi Emery, 1920 (14.2%) species were numerically dominant. Strumigenys sp.1, Strumigenys sp.2, Strumigenys sp.3, and Strumigenys sp.4 species were found only in secondary forests, suggesting the relatively stability of this habitat despite anthropogenic disturbance. Camponotus brevicollis, Technomyrmex sp.2 and Tetramorium guineensis were the indicator species in cocoa farms. In the secondary forests, Camponotus wellmani, Hypoponera punctatissima and Pheidole pulchella were found as indicator species while in palm groves H. punctatissima was the only indicator species.

Monitoring and Landscape Quantification of Uncontrolled Urbanisation in Oasis Regions: The Case of Adrar City in Algeria

Nowadays, uncontrolled urbanisation is one of the major problems facing Algerian oasis regions. The monitoring and evaluation of its landscape transformations remain a key step for any oasis sustainability project. This study highlights the evolution of spatial growth in the city of Adrar in southern Algeria during the period 1986-2016 by establishing a Spatio-temporal mapping and landscape quantification. The methodological approach is based on a multi-temporal analysis of Landsat satellite images for 1986, 1996, 2006 and 2016, and the application of landscape metrics. The results show two opposite spatial trends: significant growth of built-up areas against an excessive loss of palm groves. The landscape metrics allowed the identification of a progressive fragmentation process characterising the palm groves. Thus, the findings of this study show the utility of satellite imagery and landscape metrics approach for monitoring urbanisation patterns and assessing their impacts on oasis ecosystems.

Raphia Palm Grove Diversity and Wetland Conservation Challenges: Evidence from Fotouni in the Western Highlands of Cameroon

Aims: Assessing the conservation status of Raphia and the interaction between local populations and Raphia palm groves in Fotouni
 Study Design: Descriptive Cross-Sectional
 Place and Duration of Study: The study was carried out in the West Region of Cameroon (Fotouni)
 Methodology: A total of 60 Raphia palm grove owners were involved in the interview using questionnaires; mapping and direct observations were additional tools.
 Results: According to the perception of 93% of the surveyed respondents, the quantity of Raphia in the area has decreased over the past 15 years, due mainly to agriculture (N=48; 80.00%) and non-regeneration (N=18; 30.00%). Farming was the main activity in the area. Raphia in the area is mainly used for building, craft, food source, medicine and agriculture. Respondents confirmed the presence of a diversified mesofauna in Raphia palm groves, dominated by rodents. Mapping gave evidence of a close relationship between Raphia palm groves and water points. In addition, Raphia provides firewood and wine. Good maintenance (N=55; 91.67%) and regeneration (N=45; 75.00%) are the main strategies implemented by the respondents to preserve their Raphia palm groves. For a long-term preservation, respondents proposed: sensitization (N=14; 23.33%), re-planting (N=20; 33.33%), pasting of warning and use of fetishes (N=16; 26.67%).
 Conclusion: The current state of Raphia palm groves in Fotouni is not favourable to wetland conservation. The Ministry of Environment, Nature Protection and Sustainable Development should provide a national inventory of Raphia coverage while the local population should adopt healthy behaviours towards the exploitation of Raphia.

Response of Date Palms Cv. Zahdi to Foliar Spray with Urea and Seaweed Extract

This study was conducted in one of the private palm groves in Anbar governorate, Heet city, Al-Furat district during the 2019-2020 growing season on date palm trees (Zahdi cultivar), to study the effect spraying urea at a concentration (0, 1 and 2 g L−1) and seaweed algae extract at a concentration (0, 2 and 4 ml L−1). Twenty-seven of 20-year-old trees were selected. A factorial experiment was carried out in randomized complete blocks design (RCBD) included 9 treatments and 3 replications. The results showed that urea treatments especially 2 g L−1 have the best yield traits (fruit weight, cluster weight, yield and reducing sugars in fruits which reached (9.62 g, 13.62 kg, 163.2 kg tree−1 and 54.07%), respectively. As to 1g L−1 urea gave the highest volume of fruits which is (6.43 cm3). Whereas the urea has no significant effect on the nitrate content in fruits . On the other hand, the spraying with 4 ml L−1 of seaweed extract has significant effect on volume of fruits and reducing sugars that reached to the highest values of (6.21 cm3 and 53.86%), respectively. While the concentration of 2 ml L−1 revealed the highest cluster weight of (13.21kg and total yield of 132.1kg tree−1). Furthermore, it reduced nitrate content of fruit to the minimum level of (30.95 mg L−1).

Cost analysis of date palm (cv. Mejhoul) plantlets produced by organogenesis in Morocco

Organogenesis is an in vitro regeneration method used for rapid and large-scale propagation of a number of plant species. During the last decade, organogenesis has been used as a tool to rehabilitate date palm groves in Morocco, and resulted in the production of millions of date palm plantlets. In the present study, the production cost of date palm plantlets (cv. Mejhoul) obtained through direct organogenesis was estimated. The organogenesis protocol used was based on previously published studies. The cost analysis included the costs of offshoots, culture medium components, chemicals, equipment maintenance, water, fuel and electricity consumption as well as staff salaries and all the consumables used during in vitro work and plantlet acclimatization. The hardware (infrastructure, laboratory equipment and vessels) cost was not included. During the production process, the loss of plant material due to endophytic bacteria, tissue browning and hyperhydricity was taken into account. At the end of the organogenesis process, an average of 947.6 plantlets were produced from one offshoot. It was found that staff salaries (46.05%) and electricity consumption (26.16%) account for the majority of expenses. The production cost of one plantlet was estimated to be US$ 3.84. The findings of the present study highlight the economic feasibility of using organogenesis for date palm propagation. The production cost of date palm plantlets through organogenesis was estimated. The economic feasibility of this technique was highlighted when compared with conventional propagation through offshoots.

Quantification of the Outdoor Thermal Comfort within Different Oases Urban Fabrics

Oases settlements are common entities of human agglomerations throughout desert regions. Oases settlements face several environmental challenges such as climate change, which can render them insufferably hot and unlivable within decades. Therefore, this study aims to assess the outdoor thermal comfort variation within three different oases urban fabrics of Tolga Oases Complex in Algeria. The overarching aim is to quantify thermal comfort and guide landscape, and urban designers improve outdoor thermal comfort. The methodology relies on microclimatic measurements and weather datasets (TMY2, TMY3, TMYx), combining observations and numerical simulations. A total of 648 Physiological Equivalent Temperature (PET) values were calculated in three different urban fabrics in Tolga Oases Complex, Algeria. Between 2003 and 2017, a remarkable microclimatic change was found, causing a high and accelerated heat stress level of 76%. The study results inform architects, urban planners and climatologists about climate change effects and urban sprawl impact on the oases lands. Moreover, urban strategies should seek mitigation and adaptation benefiting from the existing green infrastructure of palm groves.

Diversity of beetles associated with watermelon crops Citrullus lanatus (Thunb.) Mats. in the region of Ouargla (southern Algeria)

We studied the diversity of beetle families in watermelon fields in the palm grove of Zaatote at Ouargla (34º 54′ N, 5º 20′ E). The sampling method used was Barber pots as they allowed the largest number of captures of insects, regarding both individuals and species. Over the three years of the study (2016, 2017 and 2018), we identified 787 individuals from 12 taxonomic families. Throughout the sampling period, the Coccinellidae family was clearly dominant, with an Fc = 35.02 % in 2016, 36.2 % in 2017 and 34.34 % in 2018. The second most dominant family was Tenebrionidae with an Fc = 26.35 % in 2016, 30.04 % in 2017, and 33.33 % in 2018. Other families were poorly represented. In 2016, regarding their trophism, 18 species of beetles (30.91 %) were phytophagous and feed on the watermelon crop, while 26 species were predatory and decomposing auxiliaries. Data published through GBIF (Doi: 10.15470/sfhxty)

Contribution to monitoring the influence of air temperature on some phenological stages of the date palm (cultivar ‘Deglet Nour’) in Biskra

Algeria, one of the potential date producers in the world, is exposed to the different impacts of global warming. This climatic phenomenon probably has repercussions on date palm cultivation. The main purpose of this contribution is to monitor the phenological stages of the date palm and calculate the thermal requirements for this plant, also the study of impacts temperature on date growth. The results obtained are compared with older data recorded in the same region. We recorded the temperatures of the air measured inside two palm groves in the wilaya (state) of Biskra, namely Zaouiet Ben Ouaar and Mangae Bougtaf. At the same time, weekly observations were made to follow the phenological stages of Deglet Nour during two agricultural seasons (2015–2017), at the level of these two palm groves; in order to highlight the relationship between air temperature and the growth of the cultivar date studied. The first results show that Deglet Nour, in Biskra, ripens after around 250 days from the date of appearance of female inflorescences, with thermal requirements that exceed 4000 °C. Air temperature is one of the limiting factors of date palm growth. It has a direct influence on the development of dates and on the quality and yield of this product. Phoenix dactylifera L. can withstand extreme temperatures, going from freezing to over 50 °C.

Biocontrol of Bayoud Disease (Fusarium oxysporum F. Sp. Albedinis) on Deglet-nour Variety of Date Palm (Phoenix dactylifera L.) in South Western Oases of Algeria

Background: This work has the objective to biocontrol the bayoud disease of date palm caused by the fungus Fusarium oxysporum f. sp. albedinis (Foa), is the major disease in Algerian palm groves of south western region. This in vivo biocontrol was done on date palm variety Deglet-Nour, using two antagonistic fungi species, Trichoderma harzianum and Aspergillus flavus.Methods: Twenty Foa isolates obtained from isolation of the spines carrying the typical symptoms of Bayoud disease were used. Two strains T. harzianum and A. flavus, were isolated from rhizosphere soils of the date palm trees. Using the greenhouse screening test, which was carried out on 3-4 month-old date palm seedlings at the rate of 5 ml of inoculum suspension.Result: A statistical analysis showed a significant (P less than 0.05), difference of Deglet-Nour seedlings reactions against Foa isolates and antagonistic fungi were observed. All date palm trees present susceptibility against Foa until the total mortality of seedlings. The biocontrol test showed that two antagonists showed different reaction, with the complete resistance for seedlings treated by T. harzianum with the mortality rate (rm%) reduced at 100%, while, the second antagonist A. flavus reduced the rm% at 25%. We can apply of these antagonistic fungi to protect our groves contaminated by Bayoud disease and also contain this susceptible commercial variety.

Biochemical resistance mechanisms against chlorpyrifos, imidacloprid and lambda-cyhalothrin in Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae)

Rhynchophorus ferrugineus is the serious insect pest of palm groves. Chemical control against this species is an important constituent for developing an IPM strategy. But repeated use of the same class of synthetic chemicals to control a pest can cause resistance. The research was conducted to evaluate resistance in R. ferrugineus against commonly used synthetic insecticides (chlorpyrifos, imidacloprid and lambda-cyhalothrin) with intense selection pressure for seven successive generations under laboratory conditions. Further, biochemical assays were performed after selection with chlorpyrifos (Chlor-SEL), imidacloprid (Imida-SEL), and lambda-cyhalothrin (Lam-SEL) from G1 to G7 to estimate possible resistance mechanism against tested insecticides. The Imida-SEL, Chlor-SEL and Lam-SEL showed very high resistance 1883-fold, 488-fold and 112-fold, respectively at G7 compared to the susceptible population. Biochemical results showed that the highest activity of AChE (71.43 μmol/min mg protein) was majorly contributed in imidacloprid resistance, EST in chlorpyrifos resistance (87.18 μmol/min mg protein) and GST (83.93 μmol/min mg protein) in lambda-cyhalothrin resistance. The outcomes of the present research propose that the increased levels of enzymes have their possible role for the resistance development in R. ferrugineus and their suppression can aid in the breaking of resistance. The rotation or replacement of chlorpyrifos, and imidacloprid with lambda-cyhalothrin can be integrated for the management of R. ferrugineus.

Biodiversity and conservation of Phoenix canariensis: a review

The Canarian date palm, Phoenix canariensis, is one of the most representative endemic plant species of the Canary Islands, although it is better known for its significant horticultural interest because it is one of the most appreciated ornamental trees of the subtropical and tropical worlds for its ability to grow on a wide range of site types. The naturally-occurring Canarian palm groves are the most important genetic reservoir of the species. This review aims to bring together the most important advances reached in the past three decades relative to the distribution, genetics and reproductive biology patterns of this species. Currently, P. canariensis palm groves are experiencing conservation problems such as the high pressure of human activities, and invasive pests, so it is appropriate to summarize all the current knowledge to make it available for incorporation into conservation strategies.

Bird visits and resource use in Butia odorata (Arecaceae) palm groves in southern Brazil

ABSTRACT We evaluated avian use of a palm grove of Butia odorata (Barb. Rodr.) Noblick in the Brazilian Pampa. We recorded bird species richness, frequency of visits, and feeding behavior in palms trees with different flower and fruit availability. From January 2018 to February 2019, we observed 1,094 bird visits in 347 palm trees and identified 53 species. The most frequent visitors were Sicalis flaveola (Linnaeus, 1766), Myiopsitta monachus (Boddaert, 1783) and Zonotrichia capensis (Statius Muller, 1776). Perching was the most frequent use of palm trees by the birds (79%). Our hypothesis that an increase in the availability of flowers and fruits will be followed by a larger number of visits by insectivorous and frugivorous birds was not corroborated. In addition, there was a higher number of species visiting palm trees with no resources. The species composition and the number of guilds of visiting birds varied seasonally, but independently from resources availability. Bird richness, number of visits, and time length of visits did not vary between flowering/fruiting and resourceless palm trees. Based on this we argue that the main contribution of Butia odorata to the establishment of bird assemblages in palm groves is their role in offering perching, sheltering, and nesting sites.

REGISTRO PALEOBOTÁNICO DEL PLIO–PLEISTOCENO INFERIOR EN EL VALLE DEL RÍO URUGUAY. CARACTERIZACIÓN FITOLÍTICA DE LA FORMACIÓN SAN SALVADOR, ESTE DE LA PROVINCIA DE ENTRE RÍOS, ARGENTINA.

The San Salvador Formation is one of the few deposits from the Pliocene–Lower Pleistocene in the east of Entre Rios Province, which from a palaeontological point of view has been described exclusively through its phytolith content. This contribution includes the synthesis and expansion of this knowledge through the results of the phytolith study of the Jose Etchepare Hijo profile (Colon Department, Entre Rios). For this, an ad-hoc methodology has been used, adapted to obtain phytoliths in fluvial deposits. The sedimentary sequences were characterized by a succession of conglomerate supported matrix strata, fine to coarse sandy facies and fine facies (represented by clays and silts). The results allowed to observe a greater abundance and variability of phytoliths in layers with sandy texture; and proportionally more scarce and even absent in the gravel texture layers. Non-diagnostic grass phytoliths were common in all the samples with microremain materials, while among those of smaller size and diagnostic ones, their presence was manifested only in certain sectors of the profile. The phytolith assemblages were made up of elements from the Arecaceae, Poaceae (Bambusoideae, Panicoideae, Danthonioideae, Chloridoideae and Pooideae), and Podostemaceae families; and they have allowed inferring palaeocommunities of stratified hygrophilous forests, palm groves and riparian forests, which indicate a humid tropical-subtropical climate, with great water availability.

The longhorn beetle Jebusaea hammerschmidtii Reiche (Coleoptera: Cerambycidae): an old serious pest undermining date palm plantations

Abstract The longhorn date palm stem borer, Jebusaea hammerschmidtii Reiche has become an important pest that causes economic damage in date palm groves. The beetle has established itself in many date palm-producing countries as one of the most important biotic factors that threatens date palm cultivation and genetic diversity. The larvae of the longhorn stem borer, the destructive stage, are endophytic developing inside the date palm tissues. This article consolidates the scant literature on the beetle biology, ecology, economic impact, possible field management measures, and future research priorities.

Monitoring of Residual Forest Ecosystems Dynamics in the Mono Biosphere Reserve (Southeast Togo)

The forest ecosystems of the Lacs 2 commune (South-East, Togo) are undergoing severe degradation, which has not yet been documented. This study is carried out in order to assess and quantify the spatio-temporal dynamics of residual forests and to identify the determinants of deforestation in South East Togo. The methodological approach is based on the use of historical aerial photographs from 1976 and drone images from 2019 in addition to field investigations. Several spatial structure indices were also calculated in order to quantify the fragmentation of classes and of the forest landscape. The results show that the forest landscape is changing. The classes of forests, plantations and palm groves show an annual rate of decline of 7.5%, 0.8% and 9.4% respectively while the classes of savannahs, agglomerations, surface water and swamps increased by 16.4%, 0.4%, 0.7% and 0.1%. The results also reveal a high fragmentation within the forest, plantation, surface water and swamp class and moderate fragmentation for the savannah and palm trees classes. At the landscape level, the savannah class is dominant by more than 70%, thus making the landscape little diversified from an ecological point of view. The main driver of deforestation in the study area remains shifting slash-and-burn agriculture. It is accentuated by the establishment of perennial oil palm crops, which has influenced the annual deforestation rate by 0.72%.

IMPACT OF THE USE OF IRRIGATION WATER ON SOIL SALINIZATION CASE OF THE PALM GROVE OF BORDJ BEN AZOUZ BBA-BISKRA (ZIBAN OASIS, SOUTH-EASTERN ALGERIA)

This work deals with the physicochemical quality of water irrigation of agricultural land in the palm grove of Bordj ben Azouz. The aim is to evaluate their ability to irrigate palm groves and their effects on soil change under irrigation in the presence and / or absence of drainage. A hydro geochemical assessment of the groundwater, as well as drainage and. soil samples from irrigated and non-irrigated are performed. The electrical conductivity associated with the geochemical facies and SAR (Sodium adsorption Ratio) reflect a global salinity of the water irrigation, the drainage waters follow the same general trend as that the waters of the wells, the soils show a significant difference of the salinity between the irrigated / drained ones and the others not. The geochemical simulation was carried out using a thermodynamic model of the software Phreeqc Interactive 3.1.4-8929 indicates the supersaturation of the water with respect to the carbonate minerals and the under saturation for the evaporites where the gypsum is close to saturation even exceeds it so that it can precipitate itself by forming the gypso-limestone crust (Debdeb). To protect the environment from saline pollution, a sustainable water and salinity management plan must be installed as well as possible and continuous monitoring of the drainage system are required to remove salt water from irrigated soil.

Registros documentados de Tapirus terrestris (Perissodactyla, Tapiridae) y Myrmecophaga tridactyla (Pilosa, Myrmecophagidae) en el norte de la Cuña Boscosa santafesina (Santa Fe, Argentina)

La Cuña Boscosa santafesina se extiende por un territorio de aproximadamente 10.000 km2 conformado por Bosques altos o mixtos, Quebrachales y Algarrobales, que alternan con abras graminosas, y un gran número de arroyos y cañadas que la atraviesan. Estos ambientes se comunican hacia el norte con ambientes del Chaco Húmedo de la Provincia de Chaco, constituyendo un importante corredor biológico para especies amenazadas como Tapirus terrestris y Myrmecophaga tridactyla, categorizadas como “Vulnerables” a nivel nacional. Entre los días 22 y 24 de febrero de 2020, ambas especies fueron registradas y documentadas unos 28 km al norte de la localidad de Villa Guillermina (Santa Fe), confirmando la presencia actual de las mismas en territorio santafesino. Es posible que los ambientes que conforman y acompañan a los arroyos y cañadas de la región se encuentren funcionando como vías de traslado para ambas especies. Algunos factores locales como la interacción con el ganado vacuno, la presión de cacería, la presencia de perros domésticos, la variación hídrica y la quema de pastizales podrían explicar la dinámica de estas especies en la región. Se destaca la importancia de continuar estudiando y de conservar los ambientes del norte de la provincia de Santa Fe por ser los más ricos en biodiversidad dentro del territorio provincial, a la vez que se encuentran poco representados en el Sistema Provincial de Áreas Naturales Protegidas.

Holocene palaeoenvironmental and palaeoclimatic reconstruction of a native ecosystem on the coastal plain of southern Brazil through multi-proxy analysis

The Butiazal de Tapes (30°31′39.86″S, 51°21′31.02″W) region is located in southern Brazil on the western shore of the Patos Lagoon and presents a remnant of a native palm grove ecosystem known as butiazal. It is characterized as savanna dominated by palm trees from the Butia genus, and spreads throughout southern Brazil, Uruguay and Argentina. Species from this genus are threatened by monoculture and livestock farming. In this region there are outcrops of Pleistocene coastal deposits which were exposed to the Holocene climate and to the influence of coastal dynamics. It is therefore an excellent location for palaeoclimatic and palaeoenvironmental reconstruction of the past 11,000 years. For such a reconstruction, and better understanding as to how this unique ecosystem was formed, tools such as bioindicators (phytoliths and palynomorphs), X-ray diffractometry analysis, total organic matter content determination, particle size analysis and carbon-14 AMS dating were used. Indications of the presence of Butia in the region from at least 11,125 to 10,751 yr cal BP were identified, along with the importance of the climate during its formation and expansion. Although the climate changes in the analysed interval were not expressive, it was possible to divide the profile into 4 zones according to plant cover and observe the influence of sea-level shifts during the Holocene on the evolution of the palaeoenvironment in the region, besides the evident human influence on vegetation evolution.