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Wpływ fragmentacji kompleksów leśnych na dokładność określania powierzchni lasów na przykładzie województwa łódzkiego

100%

Budniak P., Jablonski M., Zieba S.

Sylwan

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2020

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tom 164

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nr 02

Every year official data on forest area in Poland is published by the Statistics Poland. Some of this data is based on land use information contained in the Land and Property Registry (LPR). The aim of this study was to examine compliance between forest areas obtained from official land use maps and from aerial photos. Another purpose was to investigate the impact of forest complexes fragmentation on the accuracy of forests area evaluation, using land use data. The Łódź voivodeship was selected as the study area and 280 sample plots (1 km²) were established in systematic 8×8 km grid on aerial photos. Forest areas were manually inventoried using GIS software and compared with LPR maps. In the next step inventoried forests were combined into complexes using spatial analysis. The results from this study demonstrate that 3,4% of the Łódź voivodeship is covered by forest vegetation on lands not recorded as a forest in the LPR. Therefore real value of forest area is possibly higher than those based upon data published by Statistics Poland. Additionally, the part of lands with forest vegetation not recorded as a forest in LPR in total forest area has a statistical relationship with forest complex fragmentation. Much of inventoried forest complexes (41%) officially are not considered as such because of different land use record in LPR. However, our research shows that most of them (given area not the number of objects) is located in forest complexes partly recorded in LPR with correct land use record.

2

Określenie rzeczywistej powierzchni lasów w Polsce na podstawie dostępnych danych przestrzennych

86%

Hoscilo A., Mironczuk A., Lewandowska A.

Sylwan

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2016

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tom 160

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nr 08

Several studies discussed a disagreement concerning forest extent in Poland between land cadaster and status on the ground. The aim of the paper was to assess the actual forest extent in Poland based on an existing spatial datasets such as: Digital Forest Map (covering explicitly the State Forests), Topographic Database, Database of Parcel Identification System, High Resolution Layer (Copernicus Land Monitoring product based on classification of satellite data) and National Forest Data Bank. The geospatial data analyses were preceded by an accuracy assessment of the available datasets, which allowed to assign weights to each of the dataset. The result of this project was the actual forest extent map, which refers to the national definition of forest as defined in the Forest Act of 28 September 1991 (forest by definition is a homogeneous area of 0.1 hectares). This includes all forms of ownership forests and areas that are forested, but officially recorded as non−forest. Moreover, the map of the forest extent under the Kyoto Protocol, including areas that meet the criteria of actual forest extent map and additionally forest areas designed or used for housing, recreation, infrastructure, and other industrial and agricultural areas (e.g.: permanent crops – orchards) were determined. The results confirmed that the actual forest extent is higher by almost 800 thousand hectares then the official statistics provided by the Central Statistical Office of Poland. According to the official statistics forest in Poland covers 29.4% of the country, however this study revealed that 32% of the country, considering the national forest definition, and 33.5%, considering the forest definition under the Kyoto Protocol, is occupied by forest. It showed the need for the land cadaster update. Precise information on spatial distribution of forest extent is crucial for the national purposes i.e. reporting, implementation of the National Afforestation Program and also for the international commitments under the climate convention to determine the accurate forest carbon content and carbon dioxide sequestration.

3

Stan, struktura i spoleczno-gospodarcze znaczenie lasow prywatnych w Polsce

86%

Glaz J.

Wieś Jutra

|

1999

|

nr 11-12

7-9

4

Zmiany powierzchni i przestrzennego rozmieszczenia lasow w Polsce w II polowie XX wieku

86%

Polawski Z. F.

Leśne Prace Badawcze

|

2006

|

nr 3

57-70

5

Ocena poprawności techniki ścinki drzew w lasach prywatnych na podstawie analizy pniaków

86%

Manka P.

Przegląd Leśniczy

|

2007

|

tom 17

|

nr 04

6

Ksztalt powierzchni lesnych w zachodniej czesci Beskidow

86%

Ostapowicz K.

Czasopismo Geograficzne

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2003

|

tom 74

|

nr 4

313-324

7

Zasady ogólne zarządu i zagospodarowania lasów rządowych jak prywatnych. Część pierwsza. Gospodarstwo leśne. Dział drugi. Zasady ogólne do zaprowadzenia i wykonania najstosowniejszego gospodarstwa w lasach. Oddział pierwszy. O stosunkach miejscowych wewnętrznych na gospodarstwo leśne wpływających. Rozdział I. O najlepszym stosunku lasów do pól otwartych

86%

Pfeil W., Wydrzynski K.

Sylwan

|

1842

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tom 18

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nr [2] Półrocze drugie

8

Wspolczesne zmiany powierzchni lesnej w gorach swiata

86%

Kozak J.

Przegląd Geograficzny. Polska Akademia Nauk

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2004

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tom 76

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nr 3

307-326

9

Leśnictwo w województwie pilskim

72%

Bykowski W.

Wiadomości Statystyczne

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1994

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tom 39

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nr 03

10

Lasy – bogactwo różnorodności i ich znaczenie

72%

Falencka-Jablonska M.

Aura

|

2011

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nr 05

11

Powierzchnia lasow w Unii Europejskiej prawie sie podwoila

72%

W K.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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1999

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tom 40

|

nr 2

147

12

Dzieci o lesie, czyli co nam daje las - las i lesnictwo oczami 12-latkow

72%

Zornaczuk A.

Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej

|

2006

|

tom 08

|

nr 3[13]

208-220

13

Lasy temeszowskie

72%

Czopor S.

Przegląd Leśniczy

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2007

|

tom 17

|

nr 06-07

14

Wielkoobszarowa inwentaryzacja stanu lasu źródłem informacji o powierzchni lasów w Polsce

72%

Jablonski M., Mionskowski M., Budniak P.

Sylwan

|

2018

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tom 162

|

nr 05

Forest area in Poland is annually evaluated as a part of public statistics research. However, this information is based on land use resulting from Land and Property Register (LPR). Delays in the reclassification of afforested land, as well as the natural expansion of trees on abandoned agricultural lands, observed over the last decades, caused that information from LPR becomes unreliable. In many countries forest area is assessed within the National Forest Inventories (NFIs) based upon systematic grid of sample plots. NFI in Poland has been performed since 2005, in 4×4 kilometre grid with clusters consisting of five plots. Until 2014 measurements were made only on these sample plots which were located in forest according to LPR records. Within the 3rd NFI cycle (2015−2019) the areas fulfilling the criteria of forest definition, but located on non−forest land referring to LPR, has become the object of study. The aim of this work is to present statistical approach for evaluation of forest area using NFI cluster sampling data. Additionally, results from two year measurements (2015−2016) were analysed and compared with LPR data. Attributes of NFI plots allow to apply national forest criteria as well as the land use and land cover thresholds recommended by Food and Agriculture Organization of the United Nations or Kyoto Protocol. Our research shows that forest cover in Poland is in the range of 32.8−33.0%, depending on forest definition used, and is almost 3% higher than official LPR data (30.1%). The standard error of forest cover, based on two years NFI data is 0.44. Thus, with 95% probability the true value of this parameter lies between 31.9 and 33.7%, while country thresholds of forest definition are used. Additionally it was assessed that using the entire NFI cycle data the standard error of forest cover should be lower i.e. less than 0.3. The National Forest Inventory seems to be an appropriate tool for monitoring forest area in Poland.

15

Czy unikniemy kryzysu wodnego?

72%

Karlik B.

Aura

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1990

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nr 11

16

Definicja lasu w ujęciu krajowym i międzynarodowym oraz jej znaczenie dla wielkości i zmian powierzchni lasów w Polsce

72%

Jablonski M.

Sylwan

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2015

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tom 159

|

nr 06

Sustainable forest management, the leading topic in forest and environmental policy since the 1990s, has required an appropriate tools for both clarification of general principles and measurement of its progress. Many of indicators developed for these purpose are based on forest area. However, definitions of forest are not compatible, especially on national and worldwide scale. Definition of forest applied by FAO refers to crown cover and land use, while definition adopted for reporting under Kyoto Protocol refers only to the occurrence of trees. Polish Act on Forest applies the destination of land use as a determinant of forest. Paper analyses the process of forest area assessment in Poland for the purpose of national as well as FAO and UNFCCC reporting. Natural expansion of trees on abandoned agriculture land, still classified as the agriculture areas in cadastral system, was recognized as the biggest challenge of forest area assessment in Poland. Although natural succession is described by many authors, the total area subjected to this process is unknown. According to the FAO and Kyoto Protocol rules such areas should be reported as forests. As a consequence, forest area in Poland could be at least a few hundred thousand hectares higher than reported in the last assessments basing only on cadastral system. The proper classification of forests not recorded in the cadastral system would also be important challenge, otherwise between forest area on country and international level will be a huge discrepancy. But, there are some areas classified as a forest in Poland, which probably should not be included within FAO and Kyoto reporting. However, the most important topic concerns the possibility of identification of afforested areas, submitted under article 3.3. of Kyoto Protocol, basing on forest area changes between 1989 and 2012. One should recognise if afforested area is not overestimated using such approach, as a result of modification of forest definition in Poland in 1991. Additional question concerns the forest lands included into cadastral system after 1990, but afforested or resulting from natural succession occurring before that time, which currently are reported as afforestation under article 3.3. of Kyoto Protocol.

17

Lesistość w Polsce w przekrojach terytorialnych

72%

Ciesielska K., Ciesielski M.

Wiadomości Statystyczne

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2017

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tom 62

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nr 05

18

Gospodarstwo łowieckie z historyą łowiectwa polskiego. Część III. Przyroda, i ochrona łownych zwierząt. O stosunku ilości zwierza dzikiego i ptastwa do rozległości lasu

72%

Reumann M.

Sylwan

|

1844

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tom 20

|

nr [1-2] Półrocze pierwsze i drugie

19

PGL Lasy Państwowe

72%

Kowalski J.

Drwal. Pismo Przedsiębiorców Leśnych

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2005

|

nr 04

20

Trwale zrownowazona gospodarka lesna

72%

Tarnawski W. Z.

Przegląd Papierniczy

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1998

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tom 54

|

nr 02

67-71

Ograniczanie wyników

Wpływ fragmentacji kompleksów leśnych na dokładność określania powierzchni lasów na przykładzie województwa łódzkiego

Określenie rzeczywistej powierzchni lasów w Polsce na podstawie dostępnych danych przestrzennych

Stan, struktura i spoleczno-gospodarcze znaczenie lasow prywatnych w Polsce

Zmiany powierzchni i przestrzennego rozmieszczenia lasow w Polsce w II polowie XX wieku

Ocena poprawności techniki ścinki drzew w lasach prywatnych na podstawie analizy pniaków

Ksztalt powierzchni lesnych w zachodniej czesci Beskidow

Wspolczesne zmiany powierzchni lesnej w gorach swiata

Leśnictwo w województwie pilskim

Lasy – bogactwo różnorodności i ich znaczenie

Powierzchnia lasow w Unii Europejskiej prawie sie podwoila

Dzieci o lesie, czyli co nam daje las - las i lesnictwo oczami 12-latkow

Lasy temeszowskie

Wielkoobszarowa inwentaryzacja stanu lasu źródłem informacji o powierzchni lasów w Polsce

Czy unikniemy kryzysu wodnego?

Definicja lasu w ujęciu krajowym i międzynarodowym oraz jej znaczenie dla wielkości i zmian powierzchni lasów w Polsce

Lesistość w Polsce w przekrojach terytorialnych

Gospodarstwo łowieckie z historyą łowiectwa polskiego. Część III. Przyroda, i ochrona łownych zwierząt. O stosunku ilości zwierza dzikiego i ptastwa do rozległości lasu

PGL Lasy Państwowe

Trwale zrownowazona gospodarka lesna