The decrease in the pH of oceans and the increase in their temperature are the two main problems observed in the marine ecosystems due to the increasing emission of CO₂ in the atmosphere. Both conditions can affect the ecological processes of reproduction, recruitment and survival of the marine biota. Thus, the objective of the present study was to evaluate the effects of pH decrease and temperature increase of seawater on the fertilization success and embryo-larval development of a species of tropical sea urchin. For this purpose, fertilization success (gametes) and embryo-larval development rate were determined by exposing gametes and embryos to decreasing pH values (8.0 (control), 7.7, and 7.4) and increasing temperatures (26 (control), 28, 30, 34, and 38 °C). These conditions were tested associated with each other (in synergy). The gamete test was sensitive to all investigated scenarios, the fertilization success was significantly reduced in the conditions of increased temperature (28, 30, 34, and 38 °C) associated with the ideal pH (pH 8.0) and the conditions of reduced pH (pH 7.7, and 7.4), remaining unchanged only in the ideal condition (pH 8.0 + 26 °C). However, the embryo test displayed enhanced sensitivity in the scenarios of temperature increase (28, 30, 34, and 38 °C) associated with pH decrease conditions. A significantly reduction of 29%, 23% and 10% was observed in all tested pH values at 38 °C, when compared to the control group (80%, 79.5% and 63%, respectively). Therefore, the present study suggests that the occurrence of both scenarios may have a significant impact, in the coming years, on the population of Echinometra lucunter.

由于增加的CO ₂排放，海洋的pH值降低和温度升高是海洋生态系统中观察到的两个主要问题。在大气中。两种情况都会影响海洋生物群繁殖，募集和生存的生态过程。因此，本研究的目的是评估pH值的降低和海水温度的升高对一种热带海胆物种的受精成功率和幼虫发育的影响。为此，通过将配子和胚胎暴露于降低的pH值（8.0（对照），7.7和7.4）和升高的温度（26（对照），28、30， 34和38°C）。测试了这些条件是否相互关联（协同作用）。配子试验对所有调查的情况均敏感，在温度升高的条件下，施肥成功率显着降低（28、30、34，和理想温度（pH 8.0）和降低pH的条件（pH 7.7和7.4）相关的温度（38°C），仅在理想条件（pH 8.0 + 26°C）下保持不变。但是，胚胎试验在与pH降低条件相关的温度升高（28、30、34和38°C）的情况下显示出更高的灵敏度。与对照组（分别为80％，79.5％和63％）相比，在38°C的所有测试pH值中均观察到显着降低29％，23％和10％。因此，本研究表明，在未来几年中，这两种情况的发生都可能对当地人口产生重大影响。胚胎试验在与pH降低条件相关的温度升高（28、30、34和38°C）的情况下显示出更高的灵敏度。与对照组（分别为80％，79.5％和63％）相比，在38°C的所有测试pH值中均观察到显着降低29％，23％和10％。因此，本研究表明，在未来几年中，这两种情况的发生都可能对当地人口产生重大影响。胚胎试验在与pH降低条件相关的温度升高（28、30、34和38°C）的情况下显示出更高的灵敏度。与对照组（分别为80％，79.5％和63％）相比，在38°C的所有测试pH值中均观察到显着降低29％，23％和10％。因此，本研究表明，在未来几年中，这两种情况的发生都可能对当地人口产生重大影响。棘手的幸运符。