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Isolation and Identification of Endophytic Bacteria from Kumis Kucing Leaves (Orthosiphon aristatus Benth.) 从 Kumis Kucing 叶子(Orthosiphon aristatus Benth.)中分离和鉴定内生细菌
Pub Date : 2024-04-02 DOI: 10.21776/ub.biotropika.2024.012.01.01
Nur Asni Setiani, Rafika Zahraeni, Siti Uswatun Hasanah
Endophytic bacteria are in symbiosis with plants and can produce secondary metabolites similar to those produced by their host. Kumis kucing (Orthosiphon aristatus) is a traditional medicinal plant that has been proven to have many pharmacological activities, including antiviral and antibacterial. This study aims to isolate and identify endophytic bacteria from kumis kucing leaves. Endophytic bacteria were isolated from kumis kucing leaf by spreading method on Trypticase Soy Agar (TSA) media and incubated at room temperature for 24 hours. Colonies that grew with bacterial morphology were inoculated on TSA media to obtain pure cultures. Pure cultures of isolates were identified through Gram staining, 16S rRNA gene sequencing, and bacterial growth curves. There were 8 isolates with bacterial morphology which identified by Gram staining. The staining results showed that all were classified as Gram negative with rod and coccus shapes. Sequencing using the 16S rRNA gene identified 3 bacterial isolates, Acinetobacter schindleri, Pantoea agglomerans, and Pseudomonas lurida. The three bacteria have different time to reach stationary phases in order to produce their secondary metabolites.
内生细菌与植物共生,能产生与其宿主相似的次级代谢产物。Kumis kucing(Orthosiphon aristatus)是一种传统药用植物,已被证实具有多种药理活性,包括抗病毒和抗菌。本研究旨在分离和鉴定库米斯库琴叶中的内生细菌。在胰蛋白酶大豆琼脂(TSA)培养基上采用涂抹法分离库米斯金丝桃叶的内生细菌,并在室温下培养 24 小时。将长出细菌形态的菌落接种到 TSA 培养基上,以获得纯培养物。通过革兰氏染色、16S rRNA 基因测序和细菌生长曲线鉴定分离物的纯培养物。经革兰氏染色鉴定,有 8 个分离菌具有细菌形态。染色结果显示,所有分离物均为革兰氏阴性,呈棒状和球状。通过 16S rRNA 基因测序,确定了 3 个细菌分离株,分别是施因德勒氏不动杆菌(Acinetobacter schindleri)、聚合泛函菌(Pantoea agglomerans)和鲁里达假单胞菌(Pseudomonas lurida)。这三种细菌达到静止期以产生次生代谢物的时间不同。
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引用次数: 0
Diversity and Potential Analysis of Liquid Biopesticide Bacteria for Fusarium sp. Control of Shallot -Basal Rot 液体生物农药细菌的多样性和潜力分析--用于镰刀菌防治葱-基腐病
Pub Date : 2024-04-02 DOI: 10.21776/ub.biotropika.2024.012.01.03
Nur Aini, S. Suharjono
Shallot base rot disease (Allium cepa L.) caused by the fungus Fusarium causes many crop losses, thus control efforts are required. Microbial biopesticides are used as an alternative to control pests and plant pathogens that are environmentally friendly and target-specific. This study aims to evaluate the diversity of liquid biopesticide bacteria and their potential to control the Fusarium sp. pathogen of shallots. This study includes shallot sampling, isolation and purification of liquid biopesticide bacteria, liquid biopesticide antifungal test, double culture antagonistic test of bacterial isolates against Fusarium sp., and identification of potential bacterial isolates based on 16S rDNA sequence similarity. The results showed that 2 bacterial isolates B7 and B2 had the highest Importance Value Index of 94.21% and 90.59% respectively, with a bacterial diversity index of 1.44. Liquid biopesticide microbial biomass has a high inhibition zone in the antifungal test against Fusarium sp. with an average inhibition zone of 6.45 mm. Bacterial isolate B2 has the highest potential inhibition of 71.3% against Fusarium sp. and was identified as Genus Serratia with a similarity value of 96.79%.
由真菌镰刀菌引起的葱基腐病(Allium cepa L.)造成了许多作物损失,因此需要采取控制措施。微生物生物农药是控制害虫和植物病原体的一种替代方法,它对环境友好且具有靶向性。本研究旨在评估液体生物农药细菌的多样性及其控制大葱镰刀菌病原体的潜力。本研究包括大葱取样、液体生物农药细菌的分离和纯化、液体生物农药抗真菌试验、细菌分离物对镰刀菌的双培养拮抗试验,以及根据 16S rDNA 序列相似性鉴定潜在的细菌分离物。结果表明,2 个细菌分离物 B7 和 B2 的重要值指数最高,分别为 94.21% 和 90.59%,细菌多样性指数为 1.44。液体生物农药微生物生物量在对镰刀菌的抗真菌试验中具有较高的抑制区,平均抑制区为 6.45 毫米。细菌分离物 B2 对镰刀菌的潜在抑制率最高,为 71.3%,被鉴定为 Serratia 属,相似度为 96.79%。
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引用次数: 0
SECONDARY METABOLITE PROFILE IN STEM AND ROOT OF KEJI PLANT (Staurogyne elongata (Blume) Kuntze) 姬松茸(Staurogyne elongata (Blume) Kuntze)根茎中的次生代谢物特征
Pub Date : 2024-04-02 DOI: 10.21776/ub.biotropika.2024.012.01.02
Hana Safitri, Abdul Malik, Arnia Sari Mukaromah
Keji plant (Staurogyne elongata (Blume) Kuntze) is an herbal medicinal plant that is often found on the islands of Java to Sumatra. The leaves and roots of keji plants (S. elongata) are used by the community as diuretic drugs and increase blood pressure and are believed to treat bladder stones, kidney stones, and joint problems. However, research on secondary metabolites in the stems and roots of keji plants has never been done. The aims of the study were to identify the secondary metabolites content and marker compounds in the stems and roots of keji plants. The research stages were drying and pollination of samples, extraction, and analysis using Gas Chromatography-Mass Spectrometry (GC-MS). The results showed that the compounds in the stem were nine secondary metabolite compounds from the phenol, terpenoid, alcohol and ester group. Meanwhile, secondary metabolite compounds in the roots of keji plants were ten compounds from coumaran, phenols, and ester group. The marker compounds in the stem were phenol, 2,2'-methylenebis[6-(1,1-dimethylethyl)-4-methyl- while the marker compounds in the roots were octadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester.
Keji 植物(Staurogyne elongata (Blume) Kuntze)是一种草本药用植物,常见于爪哇岛到苏门答腊岛。Keji 植物(S. elongata)的叶片和根部被社区用作利尿药,可提高血压,据信可治疗膀胱结石、肾结石和关节问题。然而,人们从未对龙脑香科植物茎和根中的次生代谢物进行过研究。本研究的目的是鉴定枸杞植物茎和根中的次生代谢物含量和标记化合物。研究阶段包括样品干燥和授粉、提取,以及使用气相色谱-质谱法(GC-MS)进行分析。结果表明,茎干中的化合物包括酚类、萜类、醇类和酯类等 9 种次级代谢化合物。同时,枸杞根中的次生代谢物化合物有 10 种,分别来自香豆素、酚类和酯类。茎中的标记化合物是苯酚、2,2'-亚甲基双[6-(1,1-二甲基乙基)-4-甲基-];根中的标记化合物是十八酸、2-羟基-1-(羟甲基)乙基酯。
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引用次数: 0
Computational Design of a Truncated Javan Spitting Cobra (Naja sputatrix) Venom Cardiotoxin Analogue as a Promising Insulinotropic Agent 通过计算设计一种截短的爪哇喷吐眼镜蛇(Naja sputatrix)毒液心脏毒素类似物,将其作为一种前景看好的促胰岛素分泌剂
Pub Date : 2024-01-23 DOI: 10.21776/ub.biotropika.2023.011.03.03
Ichda Arini Dinana, Widodo Widodo, Nia Kurniawan
Treatment options for diabetes may vary widely, however, around 50% of all diabetic patients do not reach the minimum glycemic target. Therefore, drugs that are able to lower glucose levels through unconventional targets are still needed for the treatment of type 2 diabetes. This study aimed to investigate the activity of cardiotoxins from N. sputatrix towards Kv channels as potential targets for glucose level reduction. Molecular docking analysis was conducted using the ClusPro web server, and the resulting protein-ligand interactions were visualized using BioVia Discovery Studio and LigPlus v.4.5.3. The stability of the docking structures was further examined through molecular dynamics simulations. The CTX-1, CTX-3, CTX-4, CTX-5, and CTX-KJC3 sequences from N. sputatrix were aligned and modeled, focusing on the 62-81 amino acid residues. The models of CTX-3, CTX-4, and CTX-5 demonstrated interactions with the binding site of the KcsA receptor. Additionally, substituting the Val74 residue in the CTX62-81 fragment with Lys74 resulted in reduced binding energy and mitigated the cytotoxic effects of CTX, while maintaining its insulinotropic activity
糖尿病的治疗方案可能千差万别,但约有 50%的糖尿病患者达不到最低血糖目标。因此,治疗 2 型糖尿病仍然需要能够通过非常规靶点降低血糖水平的药物。本研究旨在研究 N. sputatrix 的心脏毒素对 Kv 通道的活性,Kv 通道是降低血糖水平的潜在靶点。使用 ClusPro 网络服务器进行了分子对接分析,并使用 BioVia Discovery Studio 和 LigPlus v.4.5.3 可视化了由此产生的蛋白质配体相互作用。通过分子动力学模拟进一步检验了对接结构的稳定性。对来自 N. sputatrix 的 CTX-1、CTX-3、CTX-4、CTX-5 和 CTX-KJC3 序列进行了对齐和建模,重点研究了 62-81 个氨基酸残基。CTX-3、CTX-4 和 CTX-5 的模型显示了与 KcsA 受体结合位点的相互作用。此外,用 Lys74 取代 CTX62-81 片段中的 Val74 残基可降低结合能,减轻 CTX 的细胞毒性作用,同时保持其促胰岛素活性。
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引用次数: 0
Morphogenesis Response of Leaf and Petiole Explant of Rootstock Apple (Malus sylvestris Mill.) to Auxin and Cytokinin 根茎苹果(Malus sylvestris Mill.)叶片和叶柄外植体的形态发生对叶绿素和细胞分裂素的反应
Pub Date : 2024-01-23 DOI: 10.21776/ub.biotropika.2023.011.03.02
Wirentyas Nafika, A. Munawarti
Rootstock apple is a type of plant used in grafting propagation. Research related to the response of morphogenesis in this plant has not been widely carried out. The aim of this research was to study the effect of auxin and cytokinin ratio on the morphogenesis response of leaf and petioles explants of rootstock apple and to study variations in the ratio of auxin and cytokinin with the best response. The study used a 2-factorial Completely Randomized Design (CRD) with variations in the types of explants and combinations of plants growth regulators (PGR) in the culture medium. There were 12 treatments with five repetitions. Explants in the form of young apple leaf (third leaf) and petiole rootstock that had been sterilized and cut with a size of 5x5 mm for the leaf and 5 mm long for the petiole were inoculated into MS medium with cytokinin in the form of BAP (1 ppm) combined with auxin, IBA (0, 0.1, 0.2, 0.3, 0.4, 0.5 ppm). Each culture bottle contains five explants. The results showed that the average leaf explant was capable of producing 34% callus. Meanwhile, petiole explants produced 4% callus. Callus began to form on leaf and petiole explants on the 26th and 42nd days after inoculation respectively. Most calluses have a compact texture with variations in green, yellowish white, and brownish green. The PGR combination with the highest percentage of callus formation in leaf explants was found in the BAP 1 ppm + IBA 0.4 ppm treatment, while the petiole was in the BAP 1 ppm + IBA 0.3 ppm treatment
砧木苹果是一种用于嫁接繁殖的植物。有关该植物形态发生反应的研究尚未广泛开展。本研究旨在研究辅助素和细胞分裂素比例对砧木苹果叶片和叶柄外植体形态发生反应的影响,并研究具有最佳反应的辅助素和细胞分裂素比例的变化。该研究采用了双因子完全随机设计(CRD),对培养基中的外植体类型和植物生长调节剂(PGR)组合进行了研究。共有 12 个处理,重复 5 次。将苹果嫩叶(第三叶)和叶柄根茎形式的外植体(叶片尺寸为 5x5 毫米,叶柄长度为 5 毫米)消毒后切块,接种到含有细胞分裂素(BAP,百万分之 1)和辅助素(IBA,百万分之 0、0.1、0.2、0.3、0.4、0.5)的 MS 培养基中。每个培养瓶含有五个外植体。结果表明,叶片外植体平均能产生 34% 的胼胝体。同时,叶柄外植体能产生 4% 的胼胝质。叶片和叶柄外植体分别在接种后第 26 天和第 42 天开始形成胼胝质。大多数胼胝质地紧密,有绿色、黄白色和褐绿色。叶片外植体胼胝形成率最高的 PGR 组合是 BAP 1 ppm + IBA 0.4 ppm 处理,而叶柄外植体胼胝形成率最高的是 BAP 1 ppm + IBA 0.3 ppm 处理。
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引用次数: 0
A Comparative Profile of Free Radicals, Endogenous Antioxidants, and Cytokines in Mouse Model of Type 1 Diabetes Mellitus 1 型糖尿病小鼠模型中自由基、内源性抗氧化剂和细胞因子的比较概况
Pub Date : 2024-01-23 DOI: 10.21776/ub.biotropika.2023.011.03.04
Fikriya Novita Sari, Rizky Senna Samoedra, Setyaki Kevin Pratama, Sri Rahayu, A. Soewondo, Muhaimin Rifa'i
Diabetes mellitus is a metabolic disorder characterized by high blood glucose (hyperglycemia). Hyperglycemia will cause the body to undergo physiological changes such as free radical, antioxidant and inflammation alteration. This research aims to compare the profile of free radicals, endogenous antioxidants, and cytokines in mouse models of type 1 diabetes mellitus (T1DM). Mice were separated into two different groups, normal and diabetic mice groups. The normal group was a group of mice that were not induced to have diabetic conditions, while the diabetic mice group was induced to be diabetic using streptozotocin injection. Blood glucose levels were checked every three days for 14 days, while the immune response was evaluated after 14 days using flow cytometry. Data analysis was done using SPSS software with t-test analysis. This research showed that the increasing ROS represented by MDA would trigger inflammation in T1DM represented by the increasing TNF-alpha along with IFN-gamma and reducing anti-inflammatory cytokines represented by IL-10. Interestingly, SOD expression, which is an endogenous antioxidant, is also increased in the diabetic mice group, and we conclude that it is some sort of adaptive response of the diabetic mice group against the increasing ROS.
糖尿病是一种以高血糖(高血糖症)为特征的代谢紊乱疾病。高血糖会导致机体发生生理变化,如自由基、抗氧化剂和炎症的改变。本研究旨在比较 1 型糖尿病(T1DM)小鼠模型中自由基、内源性抗氧化剂和细胞因子的概况。小鼠被分为两组,即正常组和糖尿病组。正常组是未诱发糖尿病的小鼠,而糖尿病小鼠组则是通过注射链脲佐菌素诱发糖尿病的小鼠。每三天检查一次血糖水平,持续 14 天,14 天后使用流式细胞术评估免疫反应。数据分析采用 SPSS 软件,并进行了 t 检验分析。研究表明,以 MDA 为代表的 ROS 增加会引发 T1DM 中的炎症,表现为 TNF-α 和 IFN-gamma 增加,而以 IL-10 为代表的抗炎细胞因子减少。有趣的是,糖尿病小鼠组中内源性抗氧化剂 SOD 的表达也增加了,我们认为这是糖尿病小鼠组对 ROS 增加的某种适应性反应。
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引用次数: 0
A Mangrove Density Mapping for Sustainable Utilization and Management in Klawalu Mangrove Tourism Park, Sorong City 为可持续利用和管理索龙市 Klawalu 红树林旅游公园绘制红树林密度图
Pub Date : 2024-01-23 DOI: 10.21776/ub.biotropika.2023.011.03.01
Thomas Frans Pattiasina, Ihwan Tjolli, Aplena Ellen Bless, Krisma Lekitoo
Data and information on resource utilization supported by vegetation mapping is the basis for developing a sustainable mangrove management strategy. This study aims to map the density of vegetation and identify the use of mangroves by the community in the Klawalu Mangrove Tourism Park (Taman Wisata Mangrove Klawalu-TWMK) Sorong City. The satellite imagery used is Sentinel 2A level 1C. Image pre-processing includes atmospheric correction, geometric correction and image cropping. Determination of the extent and distribution of mangrove vegetation is carried out by applying the color composite method and mangrove boundary delineation. Mangrove vegetation density mapping was carried out by applying the Normalized Difference Vegetation Index (NDVI) method. Identification of the species and intensity of mangrove utilization was carried out through observation and interviews with respondents who were determined purposively. Based on the results of the analysis, the total area of mangrove vegetation in TWMK and its surroundings which is mapped is 144.64 ha. Of this area, 69.01 ha (47.71%) is classified as very dense, 34.96 ha (24.17%) is classified as dense and 24.23 ha (16.75%) is classified as moderate, 12. 94 ha (8.95%) is classified as sparse, and 3.5 ha (2.42%) is classified as very sparse. The intensity of resource utilization from the mangrove ecosystem is quite high, especially the utilization of mangrove wood and coral mining. Awareness/education efforts need to be continued, as well as alternative livelihood solutions to reduce the heavy dependence on mangrove resources.
以植被绘图为支撑的资源利用数据和信息是制定可持续红树林管理战略的基础。本研究旨在绘制植被密度图,并确定索龙市 Klawalu 红树林旅游公园(Taman Wisata Mangrove Klawalu-TWMK)社区对红树林的利用情况。使用的卫星图像为哨兵 2A 1C 级。图像预处理包括大气校正、几何校正和图像裁剪。红树林植被的范围和分布是通过彩色合成法和红树林边界划分法确定的。采用归一化植被指数法绘制红树林植被密度图。通过观察和采访有针对性的受访者,确定了红树林的种类和利用强度。根据分析结果,绘制的 TWMK 及其周边地区红树林植被总面积为 144.64 公顷。其中,69.01 公顷(47.71%)被归类为非常茂密,34.96 公顷(24.17%)被归类为茂密,24.23 公顷(16.75%)被归类为中等,12.94公顷(8.95%)被划分为稀疏,3.5公顷(2.42%)被划分为非常稀疏。红树林生态系统的资源利用强度相当高,尤其是红树林木材利用和珊瑚开采。需要继续开展宣传/教育工作,并提供替代生计解决方案,以减少对红树林资源的严重依赖。
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引用次数: 0
Effect of a Combination of Water Clover (Marsilea Crenata) Ethanol Extract and Moringa Leaf (Moringa oleifera) Ethanol Extract on Follicle and Oocyte Diameter of Goat: In Vitro Study 水三叶草(Marsilea Crenata)乙醇提取物与辣木叶(Moringa oleifera)乙醇提取物联合使用对山羊卵泡和卵母细胞直径影响的体外研究
Pub Date : 2023-08-01 DOI: 10.21776/ub.biotropika.2023.011.02.05
Septiawan Putranto, Sri Rahayu, G. Ciptadi, Siska Nanda Widhaningrum
Water clover (Marsilea crenata) and moringa leaves (Moringa oleifera) are types of herbal plants that are widely used in various alternative medicines. Pharmacologically, both have active compounds such as flavonoids which have cellular activities such as antioxidants and estrogenic. This study aims to evaluate the effect of a combination of water clover ethanol extract and Moringa leaf ethanol extract with different treatment groups with the same concentration on follicle and oocyte growth based on follicle diameter and oocyte diameter after six days of culture. This experimental study used 24 antral follicles (2.5-3.2 mm) which were isolated, and randomly divided into four treatment groups namely K (control) without supplementation of water clover ethanol extract and moringa leaf ethanol extract, group D1 with water clover ethanol extract, group D2 with supplementation of moringa leaf ethanol extract, and group D3 with supplementation of a combination of water clover ethanol extract and moringa leaf
水三叶草(Marsilea crenata)和辣木叶(moringa oleifera)是一种被广泛用于各种替代药物的草药植物。从药理学上讲,两者都含有活性化合物,如类黄酮,它具有抗氧化剂和雌激素等细胞活性。本研究旨在以培养6 d后的卵泡直径和卵母细胞直径为指标,评价水三叶草乙醇提取物和辣木叶乙醇提取物在相同浓度下不同处理组对卵泡和卵母细胞生长的影响。本实验选取24个分离的2.5 ~ 3.2 mm的大鼠心房卵泡,随机分为不添加水三叶草乙醇提取物和辣木叶乙醇提取物的K(对照)组、添加水三叶草乙醇提取物的D1组、添加辣木叶乙醇提取物的D2组、添加水三叶草乙醇提取物和辣木叶联合添加的D3组
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引用次数: 0
In silico Exploration of Bioactive Compounds from Withania somnifera as Inhibitor for Alpha Delta Bungarotoxin of Bungarus candidus Venom 刺蒺藜中抑制刺蒺藜毒α - δ毒素的活性化合物的硅化研究
Pub Date : 2023-08-01 DOI: 10.21776/ub.biotropika.2023.011.02.01
Kartika Prabasari, Nia Kurnianingsih, N. Kurniawan
The antivenom for Malayan krait (Bungarus candidus) venom has not yet been available in Indonesia, leading to many fatal snakebite cases. Alternative treatment approaches using medicinal plants are needed to be explored. This study investigated the potential of medicinal plants natural bioactive compounds as toxic alpha-delta protein bungarotoxin inhibitor in B. candidus venom. The approach taken is using the 3D structure of the alpha-delta protein of bungarotoxin B. candidus predicted by SWISS-MODEL. Knapsack Family Database and PubChem were used for bioactive compounds datamining.
马来亚金甲蛇毒的抗蛇毒血清在印度尼西亚还没有得到,导致许多致命的蛇咬伤病例。需要探索利用药用植物的替代治疗方法。本研究探讨了药用植物天然活性化合物作为毒毒素α - δ蛋白抑制剂的潜力。采用的方法是利用SWISS-MODEL预测的班加罗毒素念珠菌α - δ蛋白的三维结构。使用backpack Family Database和PubChem进行生物活性化合物的数据挖掘。
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引用次数: 0
Abundance and Potential of Asteroidea as Bioindicator of Lead (Pb) in the Coastal Zone at Bangkalan Regency, Madura 马杜洛拉邦卡兰县海岸带Asteroidea作为铅(Pb)生物指示物的丰度和潜力
Pub Date : 2023-08-01 DOI: 10.21776/ub.biotropika.2023.011.02.04
Yusfita Kurniawati, Arnetta Yolanda Maramis, Istatik Mudloifah, Dwi Anggorowati Rahayu
Asteroidea is a marine invertebrate that has a role as a bioindicator, but the research related to abundance and potential of Asteroidea as a bioindicator of lead on Madura Island is not to be done. This study aimed to analyze the effect of Pb concentration on Asteroidea population density in Bangkalan Regency. The transect plotting method with a plot measuring 1x1 m2 with as 30 plots in the intertidal zone for collecting data. Seawater sampling was divided into three stations, such as station I-0 meters (edge), station II-50 meters (middle) and station III-100 meters (deep zone). Data analysis was carried out with quantitative descriptive with Asteroida composition including diversity index, relative density and dominance index as parameters. The results obtained were species of starfish, Cryptasterina sp. and Aquilonastra coronata with a diversity index value of 0, a relative density of 100% and a dominance index of 1. The results for Pb concentration on Tengket Beach at a depth of 0 meters, 50 meters and 100 are 0.072 ppm; 0.16 ppm; 0.61 ppm and Pantai Modung at 0.5 ppm; 0.83 ppm; 0.82 ppm. Based on the analysis of the abundance of Asteroidea, as higher of Pb concentration contained in the waters, the lower Asteroidea’s density will be found. It concluded the abundance of Asteroidea population can be used as an indicator of Pb in coastal waters.
Asteroidea是一种具有生物指示作用的海洋无脊椎动物,但有关to Asteroidea在马杜拉岛作为铅生物指示物的丰度和潜力的研究尚未开展。本研究旨在分析铅浓度对邦卡兰县星形蝇种群密度的影响。在潮间带采用样带法,样带面积为1x1 m2,样带面积为30个样带。海水采样分为3个站点,即站点I-0米(边缘),站点II-50米(中间)和站点III-100米(深层)。数据分析采用定量描述法,以小行星组成包括多样性指数、相对密度和优势度指数为参数。结果海星、隐盘星和冠状Aquilonastra coronata的多样性指数为0,相对密度为100%,优势度指数为1。腾格特海滩0米、50米和100米深度Pb浓度为0.072 ppm;0.16 ppm;0.61 ppm和盘台模东0.5 ppm;0.83 ppm;0.82 ppm。通过对Asteroidea丰度的分析,发现水体中Pb浓度越高,Asteroidea的密度越低。结果表明,星形鱼种群丰度可作为沿海水体铅含量的指标。
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引用次数: 0
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Biotropika: Journal of Tropical Biology
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