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Environmental Topics in Biological Learning : Systematic Study of National Journal Article Indexed

Article history Received: 22 Nov 2020 Accepted: 09 Aug 2021 Published: 31 Des 2021 Background: Biology and the environment have close interactions in biodiversity, biosphere and ecosystems. The study was systematically conducted on research articles to identify environmental topics in biological education, outline the research characteristics of biological education, and synthesise research trends and gaps on environmental topics in biological education in Indonesia. Method: Cross-sectional study design is conducted through a survey of research articles published in national journals. Results: A meta-analysis of the structure and content of 41 articles in the indexed journal Sinta 1-3 found environmental pollution was the most discussed topic, followed by several other topics such as biodiversity, ecosystems and conservation. Conclusion: Most research uses experimental design and development research with structured instruments to obtain measurable learning outcomes. Therefore, it is necessary to diversify biological education research to focus more on meaningful learning transformation through integrating biological education in other fields, especially biocultural diversity.


Introduction
Biodiversity, biosphere and ecosystems are biologyrelated areas to the environment (Penick, 1995). Therefore, various topics and environmental issues are discussed in the curriculum of primary, secondary and higher education in various countries, including Indonesia. The main goal is to prepare students to individually and collaborate able to take positive actions in the environment, in addition to information transfer, improving knowledge, values and attitudes (N. Ardoin et al., 2018;N. M. Ardoin et al., 2020) To achieve these goals, various learning strategies and models are used, such as integration with mathematics to achieve quantitative abilities (Goldstein & Flynn, 2011), the art of drama to uncover social-science aspects of biology (Kinchin, 2011), poetry and drawing in the exploration of the impacts of climate change (Gebbels et al., 2011); various aspects of sustainable life education (Slingsby & Barker, 2003), the complexity of climate change (Olander & Olander, 2016), to explore the views of prospective teacher students about the relevance of science practising education in society (Mustanen & Uitto, 2020).
However, there have not been many literature reviews on environmental topics in biological education, especially in Indonesia. Whereas systematic literature review has an important role, especially to overcome duplication or proliferation in research mapping specific areas of research while identifying strengths, weaknesses, and gaps in the study of specific fields(N. Ardoin et al., 2018); reduce errors in field research through identification, critical assessment, and appropriate research cystinosis (Petticrew & Roberts, 2006). For this reason, the publication of a literature review related to environmental topics in biological education is needed. Thus, this study aims to (1) identify environmental topics in biology education (learning) in Indonesia; (2) outline the research characteristics of biological education, especially from the design, instruments and research results; (3) synthesize data related to trends and research gaps on environmental topics in biological education.

Methods
Cross-sectional study design is conducted through a survey of research articles published in national journals, from 2012 to early 2020 through a systematic review of articles. The study method refers to systematic literature review in accordance with Preferred reporting items for systematic reviews and meta-analyses (prisms) combined with environmental scope and topics in biology education (N. Ardoin et al., 2018). According to (Petticrew & Roberts, 2006), SLR is a scientific method that seeks to reduce bias in conventional literature studies, by identifying, assessing and synthesizing the library studied to answer specific questions. Systematic study can help in making room for the implementation of research results by reflecting, considering, and respecting various methods and epistemology of research (Toomey et al., 2017).
After the data is tabulated in Microsoft Excel format, then the identification and analysis is carried out quantitatively and qualitatively. Quantitative analysis is done in the form of tabulation, analysis in the form of percentages, mean and standard deviation. Qualitative analysis is conducted coding, categorization and classification of the theme of research results. Furthermore, a synthesis of trends and evaluations about biological education research gaps related to environmental topics: validation and reliability mechanisms are carried out. Each author performs synthesis and evaluation independently. If there is a gap, then a consensus has reached an agreement.

Results
From the search of articles with environmental topics in biology learning that have been indexed, the articles examined are sourced from the journal Biological Education that has been indexed by DOAJ and Garuda Portal more than articles from biology journals. More than half of all journals examined contained Sinta-2, followed by Sinta-3 and Sinta-1.

Library Article Description
Of the 136 articles that correspond to the topic of biology and environment in the Garuda portal, a total of 56 articles refer to the topic of biological and environmental education. In contrast, other articles are related to pure biology or published in proceedings. On the DOAJ portal, 78 articles were found based on biological and environmental education keywords. Once the article is repetitive (the same article is contained in both portals), the whole paper is inaccessible, and the topic covering pure biology is excluded from the sample. There are 41 articles eligible for further analysis. Table 1 shows that about one-third (33%) of library articles are published in the Journal of Education: Theory, Research, and Development, Scientiae Educatia: Journal of Science Education (25%), Journal of Educational Innovation IPA (10%), the rest, are published in nine other national journals with a percentage of 3-5% each. About threequarters (73%) of articles are contained in journals with the Sinta-2 index, the rest in indexed journals Sinta-3 (22%) and Sinta-1 (5%).    Figure 1 shows the number of articles on biological and environmental learning topics in the last ten years. The number of articles on the topic increased from 2012 to 2016, with the most published articles in 2016. Nevertheless, since 2017, the number of biology education articles on environmental topics will likely decrease until 2020. More than three-quarters (83%) of the articles were published between 2014-2017 The analysis results get 12 environmental topics with environmental pollution as the most discussed topics in the article. This is because environmental pollution is a topic that is very close to life and contextually can be seen by students. Topics are further followed by the local environment, waste management, including waste, conservation, ecosystems, biodiversity, environmental science, IPA and environment, environmental education, environmental knowledge and tempeh making through mutual understanding (Figure 3). The local environmental category covers several issues such as applying the concept of Spermatophyta plants in the local arts Sintren, sustainable food house areas, Bejoe coastal environments, environmental education ecotourism area in Balikpapan. Conservation covers the topics of sustainable development, environmental management, environmental change and conservation efforts. At the same time, the category of ecosystem topics includes the topic of plant ecology and the interaction of living things and the environment. Table 2 shows nearly half of the studies (19 articles; 46%) using experimental methods (quasi-experiment and pre-experiment), 10 (24%) with research and development design, or research and design (R&D), the rest of class action research, a combination of R&D and experimentation, surveys and descriptive research with a percentage of 3-10 per cent each.

Desain Penelitian Artikel Pustaka
For quasi-experiment research, most use pre-post test control group design with various models and approaches to learning to experimental groups, such as the implementation of community technology science, local science and wisdom, science, environment, technology and community, blended project-based learning, guided inquiry learning, problem-based learning, conservation-based scientific approach, and application of snake-storytelling media. Pre-experiment research includes learning to instil environmentally caring character, using environmental biotechnology handouts as a source of learning, and implementing guided inquiries. R&D design includes the development of environmental management learning, environmental pollution learning, inquiry-based biology learning, and learning media, such as ecotourism guides, modules, booklets, environmental education textbooks, biodiversity textbooks, and learning devices (e.g. RPP, LKS and handouts).  Figure 3 shows that more than a third of the study uses 2-3 research instruments, the rest using 1, 4 and 5 instruments. Observation guidelines, questionnaires and tests are most widely used compared to rubrics and interviews. The observation guidelines consisted of activity observation sheets, critical thinking skills, environmental care attitudes, learning implementation, and learning products. Questionnaires are mainly used in R&D research, such as expert validation questionnaires and participant response questionnaires to research products. The majority of tests are in multiple options to measure cognitive ability, especially learning outcomes. Rubrics in the form of participant assessment sheets on R&D research products, while questionnaires in the form of answer choices in the Likert Scale.

Instruments and Analysis of Library Article Data
There is one questionnaire used to evaluate environmentally caring characters (Tivani & Paidi, 2016). Most tests are in multiple-choice form, except for one study with an essay test (Juriah & Zulfiani, 2019). Similarly, most tests measure cognitive ability, especially learning outcomes, except for some tests used to assess attitudes of environmental care (Mardiana et al., 2016), science literacy (Jaelani et al., 2016), effectiveness of teaching materials (Luzyawati & Lissa, 2020). The type of instrument and data analysis used can be seen in Figure 3. As for data analysis, more than half of the articles (51%) use differential analysis in various forms, the rest a combination of inferential analysis, a combination of differential and inferential, and qualitative descriptive.

Results of library article research
The results of the research in the article analyzed were grouped into four categories: (1) cognitive, including problem formulation, understanding of concepts, ability to remember and ecological intelligence, (2) skills, covering activities, science process skills, critical thinking skills, and scientific skills), (3) attitudes, including response to learning, response to products, research, environmental and motivational caring attitudes, (4) others, including experimental literacy, creativity, character (spiritual, honest, disciplined, responsible, tolerance, mutual courtesy and confidence), potential learning resources, and related to R&D products (validity, effectiveness and readability). Figure 4 shows about a quarter of the total articles included in other categories, more than the research results in knowledge, attitudes and skills. In the picture, there are also quite a lot of articles with a combination of two (e.g. knowledge and skills), three (e.g. a combination of knowledge, skills and attitudes) or even four categories of research results (knowledge, skills, attitudes and other aspects).

Discussion
A review of the library article found a reasonably broad environmental topic ranging from pollution issues to waste management, local environmental utilization, conservation, biodiversity, and biotechnology making tempeh. The two most widely used research designs in the study were quasiexperimental design (46%) and R&D (24%), while related to instruments almost all (96%) of the study collected data using structured instruments, such as rubrics, observation sheets, tests and questionnaires; The use of experimental design and R&D with structured instruments reflects the researcher's desire to produce a measurable external (N. Ardoin et al., 2018).
The results of the exploration also found various library articles with exciting structures and content, such as a combination of R&D design and experiments (Ma'rifah & Suryadarma, 2015;Maryuningsih, 2012;Tivani & Paidi, 2016), qualitative descriptive design with PjBL model and sustainable food house coral module, the potential of tourist areas as learning resources (Ngabekti, 2014), science, environmental, technological and community learning approaches, video media-based PBL (Juriah & Zulfiani, 2019), Lesson Study-Based Inquiry Model (Istiana & Awaludin, 2018), analysis of IPA and environmental learning media needs (Ichsan et al., 2018). Furthermore, it was also found that some studies used test instruments not to measure cognitive abilities, but to assess environmental care attitudes (Mardiana et al., 2016), science literacy (Mansyur et al., 2016), the effectiveness of teaching materials (Luzyawati & Lissa, 2020), as well as questionnaires to evaluate environmental caring characters (Tivani & Paidi, 2016), not for expert validation and student response to R&D products. Similarly, it was found that one study used the essay test as an alternative to the multiple choice test that became the instrument of most research in the literature article (Juriah & Zulfiani, 2019).
The various research results that have been presented in this review show the flexibility of environmental topics in biological learning, and positive results about the learning that has been implemented. Although some studies have used interesting designs, approaches and instruments, further research is suggested using other research designs such as ethnography, case studies and participatory research. The development of instruments in subsequent research also needs to be considered, for example questionnaires with drawings, problem solving diagrams. The integration of biological learning with other fields of study also needs to be considered. Previous research has shown that the integration between active learning and quantitative skills by slightly modifying the practicum curriculum effectively enhances understanding of the importance of statistical concepts in biological education (Goldstein & Flynn, 2011). (Kinchin, 2011) proves the use of concept maps can encourage teachers to become facilitators of meaningful learning by providing opportunities for students to construct their learning outcomes.
On the other hand, the research results on the use of images to identify the causes of air pollution revive science learning and is a very appropriate mechanism in allowing students to communicate their views on environmental issues to other members of society (Gebbels et al., 2011). No less exciting research with a grounded theory approach by (Mustanen & Uitto, 2020) found student assessment of the gap between the curriculum of biological education and the practice of everyday science in society and nature. For a rich Indonesian context with a wide range of biocultural diversity, local environmental-oriented action studies need to be considered to recognize and strengthen the interaction between biology and socio-cultural systems of society (Toomey et al., 2017). For example, the diversity of bio-cultures in Subak culture is related to Hindu religious ritual activities in Bali, which link biodiversity, culture and the Balinese language. From this bio-culture can be found the relationship between the type of animal and the name of the animal (in Balinese) used in religious ritual activities, for example, is Ayam (Gallus gallus domesticus), whose fur is colourful, in Balinese called ready brumbun (fur or skin with white, red, yellow and black elements) used in Hindu religious ritual activities for Caru Eka Sata ceremonies; Caru Manca Sata, a driver.
The systematic review is done by assessing only library articles in two databases so that it does not include all articles that have been published. In addition, the articles examined only meet the criteria following the established study methods. Although the research team has tried objectively in terms and mechanisms of review, subjectivity is inevitable, as in deciding the categories of research results. Another limitation is that the study is done only on abstract or complete paper (full paper) articles that can be accessed online. Thus, it is possible to ignore articles worth further investigation but cannot be accessed online. The study was also limited to articles in national journals with indexes Sinta-1, 2 and 3, excluding articles with good research quality but published in journals outside the index. Sinta index criteria 1-3 are used to standardize the study to focus on articles published in journals with a peerreview process rated very good until good enough. The study is also limited to a relatively short duration of time. That way, this study does not include articles that meet the criteria but are published before or after that period. Article searches are done through the keywords "biological education" and "environment" so it is possible to ignore articles that do not explicitly use both keywords, but according to experts and other researchers, it should fall within the topic's scope. Despite all these limitations, the study is expected to contribute to broader discussions, encourage more process-oriented biological education research to evaluate the effects of learning on more environmentally friendly behaviour, and provide support in the integration of environmental education and biological education to produce a compatible curriculum for both fields of science.

Conclusion
This systematic study seeks to elaborate and critically analyze library articles related to environmental topics in biological education for primary, secondary and higher education levels. The topic studied in this research is the topic of biology and environmental learning in articles that have been published on the DoAJ and Garuda portals that have been indexed SINTA 1-3. The two most widely used research designs in this study are quasi-experimental design (46%) and R&D (24%), then 96% of studies examined using structured instruments, such as rubrics, observation sheets, tests, and questionnaires. The results showed the flexibility of environmental topics in biological learning and positive results about learning that its researchers had implemented. The characteristics of biological education research that has been studied in this study have a positive externality to knowledge, skills, attitudes, and produce various learning media products. The trends and gaps in research on environmental topics in biological education in Indonesia studied in this study reveal the approaches, designs, instruments and results of research that has been done so far and research that still needs to be explored in the future. In addition to focusing on measurable outcomes, biological education research is needed with different approaches, such as the ability to describe environmental issues, problems and challenges, and the experience to collaborate. The integration of bioculture diversity in biological education needs to be prioritized to provide students with meaningful experiences about the close interaction between biodiversity and cultural diversity (including the language) of the archipelago.

Declaration statement
The authors reported no potential conflict of interest.